and here is how it looks when Re-connected (after reboot - switch off-on - or unplug)

 

 

 

 

 

 

 

 

 

Some update here.

 

Switched to 3G and connection lasted overnight without permanent interruption, so no need to manually reboot or restart the router as I have to do when on 4G. Also found that although signal strength on 3G varies from 100% to 0%! every 1-2 minutes or so, connection stays alive or auto re-connects in some way so does not drop completely like does when on 4G. I must add here that when on 4G, signal strength rarely varies from 50% to 100% although usually (90% of the time) shows 75% and 2 bars on the router's LED panel. (remaining 10% of the time is shared between 50% and 100% of 4G signal strength - 1 or 3 bars respectively)

 

24 hours in "3G only" with frequent interruptions but no disconnection at all !  That's great after all...

 

So (in my case) my guess is that "4G Preferred" selection does not work properly because it should interchange between 4G and 3G signal instead of total disconnection when 4G signal strength drops instantly for some reason. Hope that helps TP-Link techs to investigate in detail this situation.

 

I just have to check if "4G only" is more stable than "4G Preferred" ...who knows

 

edit: checked "4G only" no luck ...lasted 5 mins before total disconnect with 75% of 4G signal strength (if reception rating is accurate)

 

@Nickatsikas

 

3G is more stable than 4G, I think its because there is only one 3G band that the ISP is using so the router only locks to that single 3G band and so it doesn't have a speed or disconnection issue that frequently, as for the 4G network the ISP uses 2 to 3 LTE bands, the router keeps switching between those bands automatically every few minutes or a few hours if we are lucky and it creates some kind of problem I guess switching between different bands back and forth. The lack of band lock / band selection is also causing a lot of problems, one minute I'm getting good download speed 17 Mbps and 20 Mbps Upload and the next minute I'm getting 12 Mbps Download and 1 Mbps Upload and 5 Mbps download and 16 Mbps Upload, I noticed this while running speed test and the network bars were changing between 3 to 1 network bar. I get the best download and upload speed on 3 network bars, on 2 network bars I either get 12 Mbps Download and 1 Mbps Upload or 5 Mbps Download and 16 Mbps Upload but mostly 1 Mbps Upload speed.

 

I had been using 3G for 4 or 5 days now and as you have mentioned in your post, the signal strength drops to 0% from 100% sometimes. You'll also see a disconnection on 3G but not as frequent as on 4G mode. Here is the disconnection from my system log, I have marked in red color. See if you have the disconnection too in you system log.

 

 

2016-01-01 05:30:30 [5] 3G: init LTE module, set flowstat [enableDataLimit 0, enablePaymentDay 0, paymentDay 1, limitation 0, warningPercent 90]
2016-01-01 05:30:30 [5] 3G: LTE Module: profile num [1], default profile [1], active profile [0]
2016-01-01 05:30:30 [5] 3G: DM: profile num [1], default profile [1], active profile [0]
2016-01-01 05:30:32 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2016-01-01 05:30:32 [5] DHCPC: Recv OFFER from server 100.113.210.182 with ip 100.113.210.181
2016-01-01 05:30:32 [5] DHCPC: Send REQUEST to server 100.113.210.182 with request ip 100.113.210.181
2016-01-01 05:30:33 [5] DHCPC: Recv ACK from server 100.113.210.182 with ip 100.113.210.181 lease time 7200
2020-03-28 09:53:29 [5] 3G: LTE internet connected.
2020-03-28 09:53:29 [5] 3G: rsl_lte_setDns6 lte wan addr6 route:  ::  

2020-03-28 09:53:29 [5] 3G: get LTE wan4 100.113.210.181
2020-03-28 09:53:29 [5] 3G: get LTE wan6 0:0:80c5:3077::
2020-03-28 09:53:29 [5] 3G: set LTE wan6 conn status Connected
2020-03-28 09:53:29 [5] 3G: set LTE wan6 name LTE
2020-03-28 09:53:29 [5] 3G: set LTE wan6 prefix ::
2020-03-28 09:53:29 [5] 3G: set LTE wan4 100.113.210.181
2020-03-28 09:53:29 [5] 3G: set LTE wan6 0:0:80c5:3077::
2020-03-28 09:53:29 [5] 3G: set LTE dns6 ::7730:c580:0:0,0:0:80c5:3077::
2020-03-28 09:53:29 [5] 3G: set LTE default gw ::
2020-03-28 09:53:29 [5] DHCPC: Send REQUEST to server 100.113.210.182 with request ip 100.113.210.181
2020-03-28 09:53:30 [5] DHCPC: Recv ACK from server 100.113.210.182 with ip 100.113.210.181 lease time 7200
2020-03-28 09:54:22 [6] 3G: USER: Start disconnecting from the network!

2020-03-28 09:54:22 [5] 3G: dataSwitch: 0
2020-03-28 09:54:22 [6] 3G: USER: Disconnected from the network!

2020-03-28 09:54:26 [5] 3G: lte internet disconnected.
2020-03-28 09:54:26 [5] 3G: rsl_lte_setDns6 delete lte wan addr6 route:  0:0:80c5:3077::  

2020-03-28 09:54:26 [5] 3G: get LTE wan4 
2020-03-28 09:54:26 [5] 3G: get LTE wan6 
2020-03-28 09:54:26 [5] 3G: set LTE wan6 conn status Connected
2020-03-28 09:54:26 [5] 3G: set LTE wan6 name LTE
2020-03-28 09:54:26 [5] 3G: set LTE wan6 prefix ::
2020-03-28 09:54:26 [5] 3G: set LTE wan4 100.113.210.181
2020-03-28 09:54:26 [5] 3G: set LTE wan6 
2020-03-28 09:54:26 [5] 3G: set LTE dns6 ::7w%ðc580:0:0,
2020-03-28 09:54:26 [5] 3G: set LTE default gw ::
2020-03-28 09:54:26 [6] DHCPC: Unicasting a release of 100.113.210.181 to 100.113.210.182
2020-03-28 09:54:28 [5] 3G: networkPreferredMode: 1
2020-03-28 09:54:31 [6] 3G: USER: Network type is WCDMA.

2020-03-28 09:54:37 [5] 3G: dataSwitch: 1
2020-03-28 09:54:52 [6] 3G: USER: Get ISP's profile now.

2020-03-28 09:54:52 [6] 3G: USER: GetCurrProf result is:ipver:0  staticApn:0  authType:2  pkgName:Airtel (Assam)  profname:Airtel  apn:airtelgprs.com  usr:  psw:  

2020-03-28 09:54:52 [6] 3G: USER: Start connecting to the network!

2020-03-28 09:54:58 [6] 3G: USER: Connected to the network!

2020-03-28 09:55:01 [5] 3G: LTE internet connected.
2020-03-28 09:55:01 [5] 3G: rsl_lte_setDns6 lte wan addr6 route:  ::  

2020-03-28 09:55:01 [5] 3G: get LTE wan4 100.76.77.235
2020-03-28 09:55:01 [5] 3G: get LTE wan6 0:0:80c5:3077::
2020-03-28 09:55:01 [5] 3G: set LTE wan6 conn status Connected
2020-03-28 09:55:01 [5] 3G: set LTE wan6 name LTE
2020-03-28 09:55:01 [5] 3G: set LTE wan6 prefix ::
2020-03-28 09:55:01 [5] 3G: set LTE wan4 0.0.0.0
2020-03-28 09:55:01 [5] 3G: set LTE wan6 0:0:80c5:3077::
2020-03-28 09:55:01 [5] 3G: set LTE dns6 ::7730:c580:0:0,0:0:80c5:3077::
2020-03-28 09:55:01 [5] 3G: set LTE default gw ::
2020-03-28 09:55:01 [5] DHCPC: Send REQUEST to server 0.0.0.0 with request ip 100.113.210.181
2020-03-28 09:55:01 [5] DHCPC: Recv NAK from server 100.76.77.236 with ip 100.113.210.181
2020-03-28 09:55:05 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2020-03-28 09:55:05 [5] DHCPC: Recv OFFER from server 100.76.77.236 with ip 100.76.77.235
2020-03-28 09:55:06 [5] DHCPC: Send REQUEST to server 100.76.77.236 with request ip 100.76.77.235
2020-03-28 09:55:06 [5] DHCPC: Recv ACK from server 100.76.77.236 with ip 100.76.77.235 lease time 7200
2020-03-28 10:55:08 [5] DHCPC: Send REQUEST to server 100.76.77.236 with request ip 100.76.77.235
2020-03-28 10:55:08 [5] DHCPC: Recv ACK from server 100.76.77.236 with ip 100.76.77.235 lease time 7200
2020-03-28 11:55:09 [5] DHCPC: Send REQUEST to server 100.76.77.236 with request ip 100.76.77.235
2020-03-28 11:55:09 [5] DHCPC: Recv ACK from server 100.76.77.236 with ip 100.76.77.235 lease time 7200
2020-03-28 12:55:09 [5] DHCPC: Send REQUEST to server 100.76.77.236 with request ip 100.76.77.235
2020-03-28 12:55:10 [5] DHCPC: Recv ACK from server 100.76.77.236 with ip 100.76.77.235 lease time 7200
2020-03-28 13:55:10 [5] DHCPC: Send REQUEST to server 100.76.77.236 with request ip 100.76.77.235
2020-03-28 13:55:11 [5] DHCPC: Recv ACK from server 100.76.77.236 with ip 100.76.77.235 lease time 7200
2020-03-28 14:55:11 [5] DHCPC: Send REQUEST to server 100.76.77.236 with request ip 100.76.77.235
2020-03-28 14:55:12 [5] DHCPC: Recv ACK from server 100.76.77.236 with ip 100.76.77.235 lease time 7200
2020-03-28 15:55:13 [5] DHCPC: Send REQUEST to server 100.76.77.236 with request ip 100.76.77.235
2020-03-28 15:55:13 [5] DHCPC: Recv ACK from server 100.76.77.236 with ip 100.76.77.235 lease time 7200
2020-03-28 16:55:14 [5] DHCPC: Send REQUEST to server 100.76.77.236 with request ip 100.76.77.235
2020-03-28 16:55:14 [5] DHCPC: Recv ACK from server 100.76.77.236 with ip 100.76.77.235 lease time 7200
2020-03-28 17:54:58 [6] 3G: ERROR: 0x0000000F QMI_ERR_OUT_OF_CALL

2020-03-28 17:54:58 [6] 3G: ERROR: Get runtime param for ip#0 failed (0).

2020-03-28 17:54:58 [6] 3G: USER: The network disconnected, start autoconnect!

2020-03-28 17:54:58 [6] 3G: USER: Get ISP's profile now.

2020-03-28 17:54:58 [6] 3G: USER: GetCurrProf result is:ipver:0  staticApn:0  authType:2  pkgName:Airtel (Assam)  profname:Airtel  apn:airtelgprs.com  usr:  psw:  

2020-03-28 17:55:03 [6] 3G: USER: Connected to the network!

2020-03-28 17:55:03 [6] DHCPC: Unicasting a release of 100.76.77.235 to 100.76.77.236
2020-03-28 17:55:04 [5] DHCPC: Send REQUEST to server 0.0.0.0 with request ip 100.76.77.235
2020-03-28 17:55:04 [5] DHCPC: Recv NAK from server 100.110.188.141 with ip 100.76.77.235
2020-03-28 17:55:08 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2020-03-28 17:55:08 [5] DHCPC: Recv OFFER from server 100.110.188.141 with ip 100.110.188.142
2020-03-28 17:55:09 [5] DHCPC: Send REQUEST to server 100.110.188.141 with request ip 100.110.188.142
2020-03-28 17:55:09 [5] DHCPC: Recv ACK from server 100.110.188.141 with ip 100.110.188.142 lease time 7200
2020-03-28 18:55:09 [5] DHCPC: Send REQUEST to server 100.110.188.141 with request ip 100.110.188.142
2020-03-28 18:55:10 [5] DHCPC: Recv ACK from server 100.110.188.141 with ip 100.110.188.142 lease time 7200
2020-03-28 19:55:11 [5] DHCPC: Send REQUEST to server 100.110.188.141 with request ip 100.110.188.142
2020-03-28 19:55:11 [5] DHCPC: Recv ACK from server 100.110.188.141 with ip 100.110.188.142 lease time 7200
 

 

@Creeper 

 

Thanks Creeper for the explanation 

 

No I don't see any "errors", I don't even see any "3G" although that's what I use from yesterday on.

I wonder why "4G Preferred" don't use 3G as "backup signal" (like on mobile phones) in order not to get totally disconnected every now and then...

 

Here is my log file

 

2016-01-01 02:00:28 [5] DHCPD: Recv DISCOVER from 84:0D:8E:76:11:DA
2016-01-01 02:00:28 [5] 4G: init LTE module, set flowstat [enableDataLimit 0, enablePaymentDay 0, paymentDay 1, limitation 0, warningPercent 90]
2016-01-01 02:00:28 [5] 4G: LTE Module: profile num [1], default profile [1], active profile [0]
2016-01-01 02:00:28 [5] 4G: DM: profile num [1], default profile [1], active profile [0]
2016-01-01 02:00:29 [5] DHCPD: Send OFFER with ip 192.168.1.100
2016-01-01 02:00:29 [5] DHCPD: Recv REQUEST from 84:0D:8E:76:11:DA
2016-01-01 02:00:29 [5] System: Enable IPv4 SPI Firewall
2016-01-01 02:00:29 [5] System: Enable IPv6 SPI Firewall
2016-01-01 02:00:29 [5] DHCPD: Send ACK to 192.168.1.100
2016-01-01 02:00:31 [5] DHCPD: Recv REQUEST from 5C:E5:0C:5B:E5:6C
2016-01-01 02:00:31 [5] DHCPD: Send ACK to 192.168.1.106
2016-01-01 02:00:32 [5] DHCPD: Recv DISCOVER from 84:0D:8E:76:48:20
2016-01-01 02:00:32 [5] DHCPD: Send OFFER with ip 192.168.1.103
2016-01-01 02:00:32 [5] DHCPD: Recv DISCOVER from 60:01:94:D6:4F:0B
2016-01-01 02:00:33 [5] DHCPD: Send OFFER with ip 192.168.1.102
2016-01-01 02:00:33 [5] DHCPD: Recv REQUEST from 5C:E5:0C:5B:E7:81
2016-01-01 02:00:33 [5] DHCPD: Send ACK to 192.168.1.108
2016-01-01 02:00:33 [5] DHCPD: Recv REQUEST from 84:0D:8E:76:48:20
2016-01-01 02:00:33 [5] DHCPD: Send ACK to 192.168.1.103
2016-01-01 02:00:33 [5] DHCPD: Recv REQUEST from 60:01:94:D6:4F:0B
2016-01-01 02:00:34 [5] DHCPD: Send ACK to 192.168.1.102
2016-01-01 02:00:36 [5] DHCPD: Recv REQUEST from 5C:E5:0C:5B:E3:7F
2016-01-01 02:00:36 [5] DHCPD: Send ACK to 192.168.1.107
2016-01-01 02:00:36 [5] 4G: LTE internet connected.
2020-03-28 16:47:23 [5] DHCPD: Recv REQUEST from 00:1F:3A:13:FA:C6
2020-03-28 16:47:23 [5] DHCPD: Send ACK to 192.168.1.114
2020-03-28 16:47:26 [5] DHCPD: Recv INFORM from 00:1F:3A:13:FA:C6
2020-03-28 17:18:34 [5] DHCPD: Recv DISCOVER from 60:01:94:E1:B3:25
2020-03-28 17:18:35 [5] DHCPD: Send OFFER with ip 192.168.1.101
2020-03-28 17:18:35 [5] DHCPD: Recv REQUEST from 60:01:94:E1:B3:25
2020-03-28 17:18:35 [5] DHCPD: Send ACK to 192.168.1.101
2020-03-28 17:19:52 [5] DHCPD: Recv REQUEST from 00:1F:3A:13:FA:C6
2020-03-28 17:19:52 [5] DHCPD: Send ACK to 192.168.1.114
2020-03-28 17:19:56 [5] DHCPD: Recv REQUEST from 00:1F:3A:13:FA:C6
2020-03-28 17:19:56 [5] DHCPD: Send ACK to 192.168.1.114
2020-03-28 17:21:57 [5] DHCPD: Recv DISCOVER from 84:0D:8E:76:11:DA
2020-03-28 17:21:58 [5] DHCPD: Send OFFER with ip 192.168.1.100
2020-03-28 17:21:58 [5] DHCPD: Recv REQUEST from 84:0D:8E:76:11:DA
2020-03-28 17:21:58 [5] DHCPD: Send ACK to 192.168.1.100
2020-03-28 17:22:15 [5] DHCPD: Recv DISCOVER from 94:E0:D6:E8:42:89
2020-03-28 17:22:16 [5] DHCPD: Send OFFER with ip 192.168.1.104
2020-03-28 17:22:16 [5] DHCPD: Recv REQUEST from 94:E0:D6:E8:42:89
2020-03-28 17:22:16 [5] DHCPD: Send ACK to 192.168.1.104
2020-03-28 17:22:16 [5] DHCPD: Recv DISCOVER from 5C:E5:0C:5B:E3:7F
2020-03-28 17:22:17 [5] DHCPD: Send OFFER with ip 192.168.1.107
2020-03-28 17:22:17 [5] DHCPD: Recv DISCOVER from 5C:E5:0C:5B:E3:7F
2020-03-28 17:22:17 [5] DHCPD: Send OFFER with ip 192.168.1.107
2020-03-28 17:22:17 [5] DHCPD: Recv DISCOVER from 5C:E5:0C:5B:E7:81
2020-03-28 17:22:18 [5] DHCPD: Send OFFER with ip 192.168.1.108
2020-03-28 17:22:18 [5] DHCPD: Recv DISCOVER from 5C:E5:0C:5B:E5:6C
2020-03-28 17:22:18 [5] DHCPD: Send OFFER with ip 192.168.1.106
2020-03-28 17:22:18 [5] DHCPD: Recv DISCOVER from 5C:E5:0C:5B:E5:6C
2020-03-28 17:22:19 [5] DHCPD: Send OFFER with ip 192.168.1.106
2020-03-28 17:22:19 [5] DHCPD: Recv REQUEST from 5C:E5:0C:5B:E3:7F
2020-03-28 17:22:19 [5] DHCPD: Send ACK to 192.168.1.107
2020-03-28 17:22:19 [5] DHCPD: Recv REQUEST from 5C:E5:0C:5B:E7:81
2020-03-28 17:22:20 [5] DHCPD: Send ACK to 192.168.1.108
2020-03-28 17:22:20 [5] DHCPD: Recv DISCOVER from 94:E0:D6:E8:42:E0
2020-03-28 17:22:20 [5] DHCPD: Send OFFER with ip 192.168.1.105
2020-03-28 17:22:20 [5] DHCPD: Recv REQUEST from 5C:E5:0C:5B:E5:6C
2020-03-28 17:22:21 [5] DHCPD: Send ACK to 192.168.1.106
2020-03-28 17:22:21 [5] DHCPD: Recv DISCOVER from 94:E0:D6:E8:42:E0
2020-03-28 17:22:21 [5] DHCPD: Send OFFER with ip 192.168.1.105
2020-03-28 17:22:21 [5] DHCPD: Recv DISCOVER from 94:E0:D6:E8:42:E0
2020-03-28 17:22:22 [5] DHCPD: Send OFFER with ip 192.168.1.105
2020-03-28 17:22:22 [5] DHCPD: Recv REQUEST from 94:E0:D6:E8:42:E0
2020-03-28 17:22:22 [5] DHCPD: Send ACK to 192.168.1.105
2020-03-28 17:22:22 [5] DHCPD: Recv REQUEST from 94:E0:D6:E8:42:E0
2020-03-28 17:22:23 [5] DHCPD: Send ACK to 192.168.1.105
2020-03-28 17:27:34 [5] DHCPD: Recv REQUEST from 00:1F:3A:13:FA:C6
2020-03-28 17:27:34 [5] DHCPD: Send ACK to 192.168.1.114
2020-03-28 17:27:39 [5] DHCPD: Recv INFORM from 00:1F:3A:13:FA:C6
2020-03-28 17:57:53 [5] DHCPD: Recv REQUEST from 00:1F:3A:13:FA:C6
2020-03-28 17:57:53 [5] DHCPD: Send ACK to 192.168.1.114
2020-03-28 17:57:57 [5] DHCPD: Recv INFORM from 00:1F:3A:13:FA:C6
2020-03-28 19:25:04 [5] DHCPD: Recv DISCOVER from E0:2C:B2:54:73:69
2020-03-28 19:25:04 [5] DHCPD: Send OFFER with ip 192.168.1.112
2020-03-28 19:25:04 [5] DHCPD: Recv REQUEST from E0:2C:B2:54:73:69
2020-03-28 19:25:05 [5] DHCPD: Send ACK to 192.168.1.112
2020-03-28 19:31:59 [5] DHCPD: Recv REQUEST from 00:1F:3A:13:FA:C6
2020-03-28 19:31:59 [5] DHCPD: Server id not found and request an invalid ip
2020-03-28 19:31:59 [5] DHCPD: Send NAK
2020-03-28 19:31:59 [5] DHCPD: Recv DISCOVER from 00:1F:3A:13:FA:C6
2020-03-28 19:31:59 [5] DHCPD: Send OFFER with ip 192.168.1.114
2020-03-28 19:31:59 [5] DHCPD: Recv REQUEST from 00:1F:3A:13:FA:C6
2020-03-28 19:31:59 [5] DHCPD: Send ACK to 192.168.1.114
2020-03-28 19:32:02 [5] DHCPD: Recv INFORM from 00:1F:3A:13:FA:C6
2020-03-28 19:33:48 [5] DHCPD: Recv INFORM from 00:1F:3A:13:FA:C6
2020-03-28 19:54:24 [5] DHCPD: Recv DISCOVER from E0:2C:B2:54:73:69
2020-03-28 19:54:24 [5] DHCPD: Send OFFER with ip 192.168.1.112
2020-03-28 19:54:24 [5] DHCPD: Recv REQUEST from E0:2C:B2:54:73:69
2020-03-28 19:54:24 [5] DHCPD: Send ACK to 192.168.1.112
 

@Nickatsikas

 

Try leaving the router on for more than 8 or 9+ hours or for the whole day if you can without restarting the router, the disconnection is not instant on 3G mode. I can see that you had only used the router for 3 hours when you posted the system log.

 

As you can see from my system log, the router disconnected after 8 hours of usage. The internet got connected at 9:54 A.M. and got disconnected at 17:54 A.M. I think the 3G disconnection has to do with my ISP, I remember having a disconnection after 8 hours of usage for 3G while I was using a Huawei 3G USB Modem a few years ago. So other than that I think 3G is very stable. I'll try restarting my router and do a new test and report back and see if I have a disconnection again after 8 hours of usage.

 

You cannot see 3G in your system logs because its a bug in the firmware. I get the opposite on my router, it says 3G even when I'm using 4G. My Archer MR400 HW Version is V1 btw.

 

 

UPDATE: The 3G connection got disconnected again after 8 hours. I restarted the router at 12:30 A.M. last night and it got disconnected in the morning at 8:30 A.M. so this my ISP problem but I didn't experience any internet slow down problem like on 4G mode after it reconnected, so 3G is very stable except the network bars dropping to 0% from 100% sometimes. I'll do one more test after this just to make sure.

 

 

2016-01-01 05:30:30 [6] 3G: USER: Connected to the network!

2016-01-01 05:30:30 [5] 3G: init LTE module, set flowstat [enableDataLimit 0, enablePaymentDay 0, paymentDay 1, limitation 0, warningPercent 90]
2016-01-01 05:30:30 [5] 3G: LTE Module: profile num [1], default profile [1], active profile [0]
2016-01-01 05:30:30 [5] 3G: DM: profile num [1], default profile [1], active profile [0]
2016-01-01 05:30:32 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2016-01-01 05:30:32 [5] DHCPC: Recv OFFER from server 100.98.29.153 with ip 100.98.29.154
2016-01-01 05:30:33 [5] DHCPC: Send REQUEST to server 100.98.29.153 with request ip 100.98.29.154
2016-01-01 05:30:33 [5] DHCPC: Recv ACK from server 100.98.29.153 with ip 100.98.29.154 lease time 7200
2016-01-01 05:30:36 [5] 3G: LTE internet connected.
2016-01-01 05:30:36 [5] 3G: rsl_lte_setDns6 lte wan addr6 route:  ::  

2020-03-29 00:30:51 [5] 3G: get LTE wan4 100.98.29.154
2020-03-29 00:30:51 [5] 3G: get LTE wan6 0:0:80a5:8d77::
2020-03-29 00:30:51 [5] 3G: set LTE wan6 conn status Connected
2020-03-29 00:30:51 [5] 3G: set LTE wan6 name LTE
2020-03-29 00:30:51 [5] 3G: set LTE wan6 prefix ::
2020-03-29 00:30:51 [5] 3G: set LTE wan4 100.98.29.154
2020-03-29 00:30:51 [5] 3G: set LTE wan6 0:0:80a5:8d77::
2020-03-29 00:30:51 [5] 3G: set LTE dns6 ::778d:a580:0:0,0:0:80a5:8d77::
2020-03-29 00:30:51 [5] 3G: set LTE default gw ::
2020-03-29 00:30:51 [5] DHCPC: Send REQUEST to server 100.98.29.153 with request ip 100.98.29.154
2020-03-29 00:30:51 [5] DHCPC: Recv ACK from server 100.98.29.153 with ip 100.98.29.154 lease time 7200
2020-03-29 01:07:12 [6] 3G: ERROR: Found common received char: 0x41

2020-03-29 01:07:12 [6] 3G: ERROR: Found common received char: 0x4e

2020-03-29 01:07:12 [6] 3G: ERROR: Found common received char: 0x2d

2020-03-29 01:07:12 [6] 3G: ERROR: Found common received char: 0x41

2020-03-29 01:07:12 [6] 3G: ERROR: Found common received char: 0x49

2020-03-29 01:07:12 [6] 3G: ERROR: Found common received char: 0x52

2020-03-29 01:07:12 [6] 3G: ERROR: Found common received char: 0x53

2020-03-29 01:07:12 [6] 3G: ERROR: Found common received char: 0x42

2020-03-29 01:07:12 [6] 3G: ERROR: Found common received char: 0x4c

2020-03-29 01:07:12 [6] 3G: ERROR: decode pdu failed.

2020-03-29 01:07:12 [6] 3G: ERROR: failed to handle new sms.

2020-03-29 01:07:44 [6] 3G: ERROR: Found common received char: 0x41

2020-03-29 01:07:44 [6] 3G: ERROR: Found common received char: 0x4e

2020-03-29 01:07:44 [6] 3G: ERROR: Found common received char: 0x2d

2020-03-29 01:07:44 [6] 3G: ERROR: Found common received char: 0x41

2020-03-29 01:07:44 [6] 3G: ERROR: Found common received char: 0x49

2020-03-29 01:07:44 [6] 3G: ERROR: Found common received char: 0x52

2020-03-29 01:07:44 [6] 3G: ERROR: Found common received char: 0x53

2020-03-29 01:07:44 [6] 3G: ERROR: Found common received char: 0x42

2020-03-29 01:07:44 [6] 3G: ERROR: Found common received char: 0x4c

2020-03-29 01:07:44 [6] 3G: ERROR: decode pdu failed.

2020-03-29 01:07:44 [6] 3G: ERROR: failed to handle new sms.

2020-03-29 01:08:15 [6] 3G: ERROR: Found common received char: 0x41

2020-03-29 01:08:15 [6] 3G: ERROR: Found common received char: 0x4e

2020-03-29 01:08:15 [6] 3G: ERROR: Found common received char: 0x2d

2020-03-29 01:08:15 [6] 3G: ERROR: Found common received char: 0x41

2020-03-29 01:08:15 [6] 3G: ERROR: Found common received char: 0x49

2020-03-29 01:08:15 [6] 3G: ERROR: Found common received char: 0x52

2020-03-29 01:08:15 [6] 3G: ERROR: Found common received char: 0x53

2020-03-29 01:08:15 [6] 3G: ERROR: Found common received char: 0x42

2020-03-29 01:08:15 [6] 3G: ERROR: Found common received char: 0x4c

2020-03-29 01:08:15 [6] 3G: ERROR: decode pdu failed.

2020-03-29 01:08:15 [6] 3G: ERROR: failed to handle new sms.

2020-03-29 01:09:15 [6] 3G: ERROR: Found common received char: 0x41

2020-03-29 01:09:15 [6] 3G: ERROR: Found common received char: 0x4e

2020-03-29 01:09:15 [6] 3G: ERROR: Found common received char: 0x2d

2020-03-29 01:09:15 [6] 3G: ERROR: Found common received char: 0x41

2020-03-29 01:09:15 [6] 3G: ERROR: Found common received char: 0x49

2020-03-29 01:09:15 [6] 3G: ERROR: Found common received char: 0x52

2020-03-29 01:09:15 [6] 3G: ERROR: Found common received char: 0x53

2020-03-29 01:09:15 [6] 3G: ERROR: Found common received char: 0x42

2020-03-29 01:09:15 [6] 3G: ERROR: Found common received char: 0x4c

2020-03-29 01:09:15 [6] 3G: ERROR: decode pdu failed.

2020-03-29 01:09:15 [6] 3G: ERROR: failed to handle new sms.

2020-03-29 01:10:12 [6] 3G: ERROR: Found common received char: 0x41

2020-03-29 01:10:12 [6] 3G: ERROR: Found common received char: 0x4e

2020-03-29 01:10:12 [6] 3G: ERROR: Found common received char: 0x2d

2020-03-29 01:10:12 [6] 3G: ERROR: Found common received char: 0x41

2020-03-29 01:10:12 [6] 3G: ERROR: Found common received char: 0x49

2020-03-29 01:10:12 [6] 3G: ERROR: Found common received char: 0x52

2020-03-29 01:10:12 [6] 3G: ERROR: Found common received char: 0x53

2020-03-29 01:10:12 [6] 3G: ERROR: Found common received char: 0x42

2020-03-29 01:10:12 [6] 3G: ERROR: Found common received char: 0x4c

2020-03-29 01:10:12 [6] 3G: ERROR: decode pdu failed.

2020-03-29 01:10:12 [6] 3G: ERROR: failed to handle new sms.

2020-03-29 01:12:03 [6] 3G: ERROR: Found common received char: 0x41

2020-03-29 01:12:03 [6] 3G: ERROR: Found common received char: 0x4e

2020-03-29 01:12:03 [6] 3G: ERROR: Found common received char: 0x2d

2020-03-29 01:12:03 [6] 3G: ERROR: Found common received char: 0x41

2020-03-29 01:12:03 [6] 3G: ERROR: Found common received char: 0x49

2020-03-29 01:12:03 [6] 3G: ERROR: Found common received char: 0x52

2020-03-29 01:12:03 [6] 3G: ERROR: Found common received char: 0x53

2020-03-29 01:12:03 [6] 3G: ERROR: Found common received char: 0x42

2020-03-29 01:12:03 [6] 3G: ERROR: Found common received char: 0x4c

2020-03-29 01:12:03 [6] 3G: ERROR: decode pdu failed.

2020-03-29 01:12:03 [6] 3G: ERROR: failed to handle new sms.

2020-03-29 01:30:52 [5] DHCPC: Send REQUEST to server 100.98.29.153 with request ip 100.98.29.154
2020-03-29 01:30:52 [5] DHCPC: Recv ACK from server 100.98.29.153 with ip 100.98.29.154 lease time 7200
2020-03-29 02:30:53 [5] DHCPC: Send REQUEST to server 100.98.29.153 with request ip 100.98.29.154
2020-03-29 02:30:53 [5] DHCPC: Recv ACK from server 100.98.29.153 with ip 100.98.29.154 lease time 7200
2020-03-29 03:30:54 [5] DHCPC: Send REQUEST to server 100.98.29.153 with request ip 100.98.29.154
2020-03-29 03:30:55 [5] DHCPC: Recv ACK from server 100.98.29.153 with ip 100.98.29.154 lease time 7200
2020-03-29 04:30:56 [5] DHCPC: Send REQUEST to server 100.98.29.153 with request ip 100.98.29.154
2020-03-29 04:30:56 [5] DHCPC: Recv ACK from server 100.98.29.153 with ip 100.98.29.154 lease time 7200
2020-03-29 05:30:56 [5] DHCPC: Send REQUEST to server 100.98.29.153 with request ip 100.98.29.154
2020-03-29 05:30:57 [5] DHCPC: Recv ACK from server 100.98.29.153 with ip 100.98.29.154 lease time 7200
2020-03-29 06:30:57 [5] DHCPC: Send REQUEST to server 100.98.29.153 with request ip 100.98.29.154
2020-03-29 06:30:58 [5] DHCPC: Recv ACK from server 100.98.29.153 with ip 100.98.29.154 lease time 7200
2020-03-29 07:02:11 [6] 3G: ERROR: Found common received char: 0x41

2020-03-29 07:02:11 [6] 3G: ERROR: Found common received char: 0x4e

2020-03-29 07:02:11 [6] 3G: ERROR: Found common received char: 0x2d

2020-03-29 07:02:11 [6] 3G: ERROR: Found common received char: 0x41

2020-03-29 07:02:11 [6] 3G: ERROR: Found common received char: 0x49

2020-03-29 07:02:11 [6] 3G: ERROR: Found common received char: 0x52

2020-03-29 07:02:11 [6] 3G: ERROR: Found common received char: 0x54

2020-03-29 07:02:11 [6] 3G: ERROR: Found common received char: 0x45

2020-03-29 07:02:11 [6] 3G: ERROR: Found common received char: 0x4c

2020-03-29 07:02:11 [6] 3G: ERROR: New sms count is 2

2020-03-29 07:02:11 [6] 3G: USER: Receive a new gw sms and save it successfully.

2020-03-29 07:29:55 [6] 3G: ERROR: New sms count is 1

2020-03-29 07:29:56 [6] 3G: ERROR: New sms count is 1

2020-03-29 07:30:25 [6] 3G: ERROR: New sms count is 0

2020-03-29 07:30:25 [6] 3G: ERROR: New sms count is 0

2020-03-29 07:30:58 [5] DHCPC: Send REQUEST to server 100.98.29.153 with request ip 100.98.29.154
2020-03-29 07:30:58 [5] DHCPC: Recv ACK from server 100.98.29.153 with ip 100.98.29.154 lease time 7200
2020-03-29 07:35:03 [6] 3G: ERROR: Found common received char: 0x31

2020-03-29 07:35:03 [6] 3G: ERROR: Found common received char: 0x32

2020-03-29 07:35:03 [6] 3G: ERROR: Found common received char: 0x31

2020-03-29 07:35:03 [6] 3G: ERROR: Insert raw success.

2020-03-29 07:35:05 [6] 3G: ERROR: Found common received char: 0x31

2020-03-29 07:35:05 [6] 3G: ERROR: Found common received char: 0x32

2020-03-29 07:35:05 [6] 3G: ERROR: Found common received char: 0x31

2020-03-29 07:35:05 [6] 3G: ERROR: Insert raw success.

2020-03-29 07:35:06 [6] 3G: ERROR: Found common received char: 0x31

2020-03-29 07:35:06 [6] 3G: ERROR: Found common received char: 0x32

2020-03-29 07:35:06 [6] 3G: ERROR: Found common received char: 0x31

2020-03-29 07:35:06 [6] 3G: ERROR: Insert raw success.

2020-03-29 07:35:07 [6] 3G: ERROR: Found common received char: 0x31

2020-03-29 07:35:07 [6] 3G: ERROR: Found common received char: 0x32

2020-03-29 07:35:07 [6] 3G: ERROR: Found common received char: 0x31

2020-03-29 07:35:07 [6] 3G: ERROR: Insert raw success.

2020-03-29 07:35:07 [6] 3G: ERROR: Delete raw success.

2020-03-29 07:35:07 [6] 3G: ERROR: New sms count is 1

2020-03-29 07:35:07 [6] 3G: USER: Receive a long gw sms and save it successfully.

2020-03-29 07:35:52 [6] 3G: ERROR: Found common received char: 0x41

2020-03-29 07:35:52 [6] 3G: ERROR: Found common received char: 0x4e

2020-03-29 07:35:52 [6] 3G: ERROR: Found common received char: 0x2d

2020-03-29 07:35:52 [6] 3G: ERROR: Found common received char: 0x41

2020-03-29 07:35:52 [6] 3G: ERROR: Found common received char: 0x49

2020-03-29 07:35:52 [6] 3G: ERROR: Found common received char: 0x52

2020-03-29 07:35:52 [6] 3G: ERROR: Found common received char: 0x54

2020-03-29 07:35:52 [6] 3G: ERROR: Found common received char: 0x45

2020-03-29 07:35:52 [6] 3G: ERROR: Found common received char: 0x4c

2020-03-29 07:35:52 [6] 3G: ERROR: Insert raw success.

2020-03-29 07:35:53 [6] 3G: ERROR: Found common received char: 0x41

2020-03-29 07:35:53 [6] 3G: ERROR: Found common received char: 0x4e

2020-03-29 07:35:53 [6] 3G: ERROR: Found common received char: 0x2d

2020-03-29 07:35:53 [6] 3G: ERROR: Found common received char: 0x41

2020-03-29 07:35:53 [6] 3G: ERROR: Found common received char: 0x49

2020-03-29 07:35:53 [6] 3G: ERROR: Found common received char: 0x52

2020-03-29 07:35:53 [6] 3G: ERROR: Found common received char: 0x54

2020-03-29 07:35:53 [6] 3G: ERROR: Found common received char: 0x45

2020-03-29 07:35:53 [6] 3G: ERROR: Found common received char: 0x4c

2020-03-29 07:35:53 [6] 3G: ERROR: Insert raw success.

2020-03-29 07:35:53 [6] 3G: ERROR: Delete raw success.

2020-03-29 07:35:53 [6] 3G: ERROR: New sms count is 2

2020-03-29 07:35:53 [6] 3G: USER: Receive a long gw sms and save it successfully.

2020-03-29 07:59:21 [6] 3G: ERROR: New sms count is 1

2020-03-29 07:59:21 [6] 3G: ERROR: New sms count is 1

2020-03-29 07:59:44 [6] 3G: ERROR: New sms count is 0

2020-03-29 07:59:44 [6] 3G: ERROR: New sms count is 0

2020-03-29 08:30:43 [6] 3G: USER: The network disconnected, start autoconnect!

2020-03-29 08:30:43 [6] 3G: USER: Get ISP's profile now.

2020-03-29 08:30:43 [6] 3G: USER: GetCurrProf result is:ipver:0  staticApn:0  authType:2  pkgName:Airtel (Assam)  profname:Airtel  apn:airtelgprs.com  usr:  psw:  

2020-03-29 08:30:44 [5] 3G: lte internet disconnected.
2020-03-29 08:30:44 [5] 3G: rsl_lte_setDns6 delete lte wan addr6 route:  0:0:80a5:8d77::  

2020-03-29 08:30:44 [5] 3G: get LTE wan4 
2020-03-29 08:30:44 [5] 3G: get LTE wan6 
2020-03-29 08:30:44 [5] 3G: set LTE wan6 conn status Connected
2020-03-29 08:30:44 [5] 3G: set LTE wan6 name LTE
2020-03-29 08:30:44 [5] 3G: set LTE wan6 prefix ::
2020-03-29 08:30:44 [5] 3G: set LTE wan4 100.98.29.154
2020-03-29 08:30:44 [5] 3G: set LTE wan6 
2020-03-29 08:30:44 [5] 3G: set LTE dns6 ::7w‚£°a580:0:0,
2020-03-29 08:30:44 [5] 3G: set LTE default gw ::
2020-03-29 08:30:44 [6] DHCPC: Unicasting a release of 100.98.29.154 to 100.98.29.153
2020-03-29 08:30:48 [6] 3G: USER: Connected to the network!

2020-03-29 08:30:49 [5] 3G: LTE internet connected.
2020-03-29 08:30:49 [5] 3G: rsl_lte_setDns6 lte wan addr6 route:  ::  

2020-03-29 08:30:49 [5] 3G: get LTE wan4 100.77.143.38
2020-03-29 08:30:49 [5] 3G: get LTE wan6 0:0:80a5:8d77::
2020-03-29 08:30:49 [5] 3G: set LTE wan6 conn status Connected
2020-03-29 08:30:49 [5] 3G: set LTE wan6 name LTE
2020-03-29 08:30:49 [5] 3G: set LTE wan6 prefix ::
2020-03-29 08:30:49 [5] 3G: set LTE wan4 0.0.0.0
2020-03-29 08:30:49 [5] 3G: set LTE wan6 0:0:80a5:8d77::
2020-03-29 08:30:49 [5] 3G: set LTE dns6 ::778d:a580:0:0,0:0:80a5:8d77::
2020-03-29 08:30:49 [5] 3G: set LTE default gw ::
2020-03-29 08:30:49 [5] DHCPC: Send REQUEST to server 0.0.0.0 with request ip 100.98.29.154
2020-03-29 08:30:49 [5] DHCPC: Recv NAK from server 100.77.143.37 with ip 100.98.29.154
2020-03-29 08:30:53 [5] DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0
2020-03-29 08:30:53 [5] DHCPC: Recv OFFER from server 100.77.143.37 with ip 100.77.143.38
2020-03-29 08:30:54 [5] DHCPC: Send REQUEST to server 100.77.143.37 with request ip 100.77.143.38
2020-03-29 08:30:54 [5] DHCPC: Recv ACK from server 100.77.143.37 with ip 100.77.143.38 lease time 7200
 

 

 

@Creeper 

Thank you again,

 

mine is dropping speed too low frequently on "3G only" mode, like every 2-3 minutes and lasts for 10-15 seconds. I believe it happens when reception drops from 100% to 0% - no bars - I can feel it during browsing the net, sometimes "no connection" message appears, but not at all permanent device disconnection that needs to be manually restarted/rebooted. Also not seen any "disconnection" record in the .log file- where I see some other logs that can't axplain, like "Server id not found" etc.

 

My main problem and question to TP-Link technicians is why router worked perfectly for 1+ month without even 1 disconnect on "4G Preferred" mode mounted in the exact same place, same SIM/ISP and position and suddenly does not work. 4G coverage/reception here is not excellent, but good/fair to all ISPs using mobile phones. Instead only works stable now on "3G only" mode, thus with much lower speeds, at about 30% compared to 4G

Is the device faulty? Became faulty for some reason? Should I issue a replacement to the dealer? it's only a 2,5 month device and I live 300kms away from the place of installation. What should I do to make it work as it should, like it worked for the 1st month when installed, with full 4G reception without inerruptions or any kind of problems at all.

 

2016-01-01 02:00:28 [5] DHCPD: Recv DISCOVER from 60:01:94:D6:4F:0B
2016-01-01 02:00:28 [5] 4G: init LTE module, set flowstat [enableDataLimit 0, enablePaymentDay 0, paymentDay 1, limitation 0, warningPercent 90]
2016-01-01 02:00:28 [5] 4G: LTE Module: profile num [1], default profile [1], active profile [0]
2016-01-01 02:00:28 [5] 4G: DM: profile num [1], default profile [1], active profile [0]
2016-01-01 02:00:29 [5] DHCPD: Send OFFER with ip 192.168.1.102
2016-01-01 02:00:29 [5] DHCPD: Recv REQUEST from 60:01:94:D6:4F:0B
2016-01-01 02:00:29 [5] DHCPD: Send ACK to 192.168.1.102
2016-01-01 02:00:29 [5] DHCPD: Recv DISCOVER from 84:0D:8E:76:11:DA
2016-01-01 02:00:29 [5] System: Enable IPv4 SPI Firewall
2016-01-01 02:00:29 [5] System: Enable IPv6 SPI Firewall
2016-01-01 02:00:30 [5] DHCPD: Send OFFER with ip 192.168.1.100
2016-01-01 02:00:30 [5] DHCPD: Recv REQUEST from 84:0D:8E:76:11:DA
2016-01-01 02:00:30 [5] DHCPD: Send ACK to 192.168.1.100
2016-01-01 02:00:32 [5] DHCPD: Recv DISCOVER from 84:0D:8E:76:48:20
2016-01-01 02:00:32 [5] DHCPD: Send OFFER with ip 192.168.1.103
2016-01-01 02:00:32 [5] DHCPD: Recv DISCOVER from 60:01:94:E1:B3:25
2016-01-01 02:00:33 [5] DHCPD: Send OFFER with ip 192.168.1.101
2016-01-01 02:00:33 [5] DHCPD: Recv REQUEST from 84:0D:8E:76:48:20
2016-01-01 02:00:33 [5] DHCPD: Send ACK to 192.168.1.103
2016-01-01 02:00:33 [5] DHCPD: Recv REQUEST from 60:01:94:E1:B3:25
2016-01-01 02:00:34 [5] DHCPD: Send ACK to 192.168.1.101
2016-01-01 02:00:36 [5] 4G: LTE internet connected.
2020-03-28 23:48:03 [5] DHCPD: Recv REQUEST from A4:9B:4F:88:C0:42
2020-03-28 23:48:03 [5] DHCPD: Send ACK to 192.168.1.113
2020-03-28 23:48:03 [5] DHCPD: Recv REQUEST from A4:9B:4F:88:C0:42
2020-03-28 23:48:03 [5] DHCPD: Send ACK to 192.168.1.113
2020-03-28 23:49:08 [5] DHCPD: Recv DISCOVER from A4:9B:4F:88:C0:42
2020-03-28 23:49:08 [5] DHCPD: Send OFFER with ip 192.168.1.113
2020-03-28 23:49:08 [5] DHCPD: Recv REQUEST from A4:9B:4F:88:C0:42
2020-03-28 23:49:08 [5] DHCPD: Send ACK to 192.168.1.113
2020-03-28 23:54:17 [5] DHCPD: Recv REQUEST from 00:1F:3A:13:FA:C6
2020-03-28 23:54:18 [5] DHCPD: REQUEST ip 922ba8c0 is not in the address pool
2020-03-28 23:54:18 [5] DHCPD: Send NAK
2020-03-28 23:54:18 [5] DHCPD: Recv DISCOVER from 00:1F:3A:13:FA:C6
2020-03-28 23:54:18 [5] DHCPD: Send OFFER with ip 192.168.1.112
2020-03-28 23:54:18 [5] DHCPD: Recv REQUEST from 00:1F:3A:13:FA:C6
2020-03-28 23:54:19 [5] DHCPD: Send ACK to 192.168.1.112
2020-03-28 23:54:22 [5] DHCPD: Recv INFORM from 00:1F:3A:13:FA:C6
2020-03-28 23:56:35 [5] DHCPD: Recv REQUEST from 00:1F:3A:13:FA:C6
2020-03-28 23:56:35 [5] DHCPD: Send ACK to 192.168.1.112
2020-03-28 23:56:52 [5] DHCPD: Recv REQUEST from 5C:E5:0C:5B:E5:6C
2020-03-28 23:56:52 [5] DHCPD: Send ACK to 192.168.1.106
2020-03-28 23:56:53 [5] DHCPD: Recv REQUEST from 5C:E5:0C:5B:E3:7F
2020-03-28 23:56:53 [5] DHCPD: Send ACK to 192.168.1.107
2020-03-28 23:57:14 [5] DHCPD: Recv REQUEST from 5C:E5:0C:5B:E7:81
2020-03-28 23:57:14 [5] DHCPD: Send ACK to 192.168.1.108
2020-03-28 23:57:20 [5] DHCPD: Recv DISCOVER from 94:E0:D6:E8:42:E0
2020-03-28 23:57:21 [5] DHCPD: Send OFFER with ip 192.168.1.105
2020-03-28 23:57:21 [5] DHCPD: Recv REQUEST from 94:E0:D6:E8:42:E0
2020-03-28 23:57:21 [5] DHCPD: Send ACK to 192.168.1.105
2020-03-28 23:57:36 [5] DHCPD: Recv REQUEST from 00:1F:3A:13:FA:C6
2020-03-28 23:57:36 [5] DHCPD: Send ACK to 192.168.1.112
2020-03-28 23:57:39 [5] DHCPD: Recv REQUEST from 00:1F:3A:13:FA:C6
2020-03-28 23:57:39 [5] DHCPD: Send ACK to 192.168.1.112
2020-03-28 23:57:44 [5] DHCPD: Recv INFORM from 00:1F:3A:13:FA:C6
2020-03-28 23:58:08 [5] DHCPD: Recv DISCOVER from 84:0D:8E:76:11:DA
2020-03-28 23:58:08 [5] DHCPD: Send OFFER with ip 192.168.1.100
2020-03-28 23:58:08 [5] DHCPD: Recv REQUEST from 84:0D:8E:76:11:DA
2020-03-28 23:58:09 [5] DHCPD: Send ACK to 192.168.1.100
2020-03-28 23:58:17 [5] DHCPD: Recv DISCOVER from 84:0D:8E:76:11:DA
2020-03-28 23:58:18 [5] DHCPD: Send OFFER with ip 192.168.1.100
2020-03-28 23:58:18 [5] DHCPD: Recv REQUEST from 84:0D:8E:76:11:DA
2020-03-28 23:58:19 [5] DHCPD: Send ACK to 192.168.1.100
2020-03-28 23:58:34 [5] DHCPD: Recv DISCOVER from 94:E0:D6:E8:42:89
2020-03-28 23:58:35 [5] DHCPD: Send OFFER with ip 192.168.1.104
2020-03-28 23:58:35 [5] DHCPD: Recv REQUEST from 94:E0:D6:E8:42:89
2020-03-28 23:58:35 [5] DHCPD: Send ACK to 192.168.1.104
2020-03-28 23:58:37 [5] DHCPD: Recv DISCOVER from 5C:E5:0C:5B:E3:7F
2020-03-28 23:58:37 [5] DHCPD: Send OFFER with ip 192.168.1.107
2020-03-28 23:58:37 [5] DHCPD: Recv DISCOVER from 5C:E5:0C:5B:E5:6C
2020-03-28 23:58:38 [5] DHCPD: Send OFFER with ip 192.168.1.106
2020-03-28 23:58:38 [5] DHCPD: Recv DISCOVER from 5C:E5:0C:5B:E3:7F
2020-03-28 23:58:38 [5] DHCPD: Send OFFER with ip 192.168.1.107
2020-03-28 23:58:38 [5] DHCPD: Recv DISCOVER from 5C:E5:0C:5B:E5:6C
2020-03-28 23:58:39 [5] DHCPD: Send OFFER with ip 192.168.1.106
2020-03-28 23:58:39 [5] DHCPD: Recv DISCOVER from 5C:E5:0C:5B:E7:81
2020-03-28 23:58:39 [5] DHCPD: Send OFFER with ip 192.168.1.108
2020-03-28 23:58:39 [5] DHCPD: Recv DISCOVER from 5C:E5:0C:5B:E7:81
2020-03-28 23:58:40 [5] DHCPD: Send OFFER with ip 192.168.1.108
2020-03-28 23:58:40 [5] DHCPD: Recv REQUEST from 5C:E5:0C:5B:E3:7F
2020-03-28 23:58:40 [5] DHCPD: Send ACK to 192.168.1.107
2020-03-28 23:58:40 [5] DHCPD: Recv DISCOVER from 94:E0:D6:E8:42:E0
2020-03-28 23:58:41 [5] DHCPD: Send OFFER with ip 192.168.1.105
2020-03-28 23:58:41 [5] DHCPD: Recv REQUEST from 5C:E5:0C:5B:E5:6C
2020-03-28 23:58:41 [5] DHCPD: Send ACK to 192.168.1.106
2020-03-28 23:58:41 [5] DHCPD: Recv DISCOVER from 94:E0:D6:E8:42:E0
2020-03-28 23:58:42 [5] DHCPD: Send OFFER with ip 192.168.1.105
2020-03-28 23:58:42 [5] DHCPD: Recv REQUEST from 5C:E5:0C:5B:E7:81
2020-03-28 23:58:42 [5] DHCPD: Send ACK to 192.168.1.108
2020-03-28 23:58:42 [5] DHCPD: Recv DISCOVER from 94:E0:D6:E8:42:E0
2020-03-28 23:58:43 [5] DHCPD: Send OFFER with ip 192.168.1.105
2020-03-28 23:58:43 [5] DHCPD: Recv REQUEST from 94:E0:D6:E8:42:E0
2020-03-28 23:58:43 [5] DHCPD: Send ACK to 192.168.1.105
2020-03-28 23:58:43 [5] DHCPD: Recv REQUEST from 94:E0:D6:E8:42:E0
2020-03-28 23:58:44 [5] DHCPD: Send ACK to 192.168.1.105
2020-03-28 23:58:44 [5] DHCPD: Recv REQUEST from 94:E0:D6:E8:42:E0
2020-03-28 23:58:44 [5] DHCPD: Send ACK to 192.168.1.105
2020-03-28 23:59:34 [5] DHCPD: Recv REQUEST from A4:9B:4F:88:C0:42
2020-03-28 23:59:34 [5] DHCPD: Send ACK to 192.168.1.113
2020-03-28 23:59:34 [5] DHCPD: Recv REQUEST from A4:9B:4F:88:C0:42
2020-03-28 23:59:34 [5] DHCPD: Send ACK to 192.168.1.113
2020-03-29 00:37:14 [5] DHCPD: Recv REQUEST from A4:9B:4F:88:C0:42
2020-03-29 00:37:14 [5] DHCPD: Send ACK to 192.168.1.113
2020-03-29 00:37:14 [5] DHCPD: Recv REQUEST from A4:9B:4F:88:C0:42
2020-03-29 00:37:14 [5] DHCPD: Send ACK to 192.168.1.113
2020-03-29 00:50:48 [5] DHCPD: Recv REQUEST from A4:9B:4F:88:C0:42
2020-03-29 00:50:48 [5] DHCPD: Send ACK to 192.168.1.113
2020-03-29 00:50:48 [5] DHCPD: Recv REQUEST from A4:9B:4F:88:C0:42
2020-03-29 00:50:48 [5] DHCPD: Send ACK to 192.168.1.113
2020-03-29 00:58:47 [5] DHCPD: Recv REQUEST from A4:9B:4F:88:C0:42
2020-03-29 00:58:47 [5] DHCPD: Send ACK to 192.168.1.113
2020-03-29 00:58:47 [5] DHCPD: Recv REQUEST from A4:9B:4F:88:C0:42
2020-03-29 00:58:47 [5] DHCPD: Send ACK to 192.168.1.113
2020-03-29 01:06:16 [5] DHCPD: Recv DISCOVER from 84:0D:8E:76:48:20
2020-03-29 01:06:16 [5] DHCPD: Send OFFER with ip 192.168.1.103
2020-03-29 01:06:16 [5] DHCPD: Recv REQUEST from 84:0D:8E:76:48:20
2020-03-29 01:06:17 [5] DHCPD: Send ACK to 192.168.1.103
2020-03-29 01:07:24 [5] DHCPD: Recv DISCOVER from 84:0D:8E:76:48:20
2020-03-29 01:07:24 [5] DHCPD: Send OFFER with ip 192.168.1.103
2020-03-29 01:07:24 [5] DHCPD: Recv REQUEST from 84:0D:8E:76:48:20
2020-03-29 01:07:25 [5] DHCPD: Send ACK to 192.168.1.103
2020-03-29 03:05:19 [5] DHCPD: Recv DISCOVER from A4:9B:4F:88:C0:42
2020-03-29 03:05:19 [5] DHCPD: Send OFFER with ip 192.168.1.113
2020-03-29 03:05:19 [5] DHCPD: Recv REQUEST from A4:9B:4F:88:C0:42
2020-03-29 03:05:20 [5] DHCPD: Send ACK to 192.168.1.113
2020-03-29 03:19:26 [5] DHCPD: Recv DISCOVER from A4:9B:4F:88:C0:42
2020-03-29 03:19:26 [5] DHCPD: Send OFFER with ip 192.168.1.113
2020-03-29 03:19:26 [5] DHCPD: Recv REQUEST from A4:9B:4F:88:C0:42
2020-03-29 03:19:26 [5] DHCPD: Send ACK to 192.168.1.113
2020-03-29 05:21:25 [5] DHCPD: Recv DISCOVER from 60:01:94:E1:B3:25
2020-03-29 05:21:25 [5] DHCPD: Send OFFER with ip 192.168.1.101
2020-03-29 05:21:25 [5] DHCPD: Recv REQUEST from 60:01:94:E1:B3:25
2020-03-29 05:21:26 [5] DHCPD: Send ACK to 192.168.1.101
2020-03-29 05:32:54 [5] DHCPD: Recv DISCOVER from 60:01:94:E1:B3:25
2020-03-29 05:32:55 [5] DHCPD: Send OFFER with ip 192.168.1.101
2020-03-29 05:32:55 [5] DHCPD: Recv REQUEST from 60:01:94:E1:B3:25
2020-03-29 05:32:55 [5] DHCPD: Send ACK to 192.168.1.101
2020-03-29 06:38:15 [5] DHCPD: Recv DISCOVER from 60:01:94:D6:4F:0B
2020-03-29 06:38:16 [5] DHCPD: Send OFFER with ip 192.168.1.102
2020-03-29 06:38:16 [5] DHCPD: Recv REQUEST from 60:01:94:D6:4F:0B
2020-03-29 06:38:16 [5] DHCPD: Send ACK to 192.168.1.102
2020-03-29 06:49:02 [5] DHCPD: Recv DISCOVER from 84:0D:8E:76:11:DA
2020-03-29 06:49:03 [5] DHCPD: Send OFFER with ip 192.168.1.100
2020-03-29 06:49:03 [5] DHCPD: Recv REQUEST from 84:0D:8E:76:11:DA
2020-03-29 06:49:03 [5] DHCPD: Send ACK to 192.168.1.100
2020-03-29 08:28:22 [5] DHCPD: Recv DISCOVER from 60:01:94:E1:B3:25
2020-03-29 08:28:22 [5] DHCPD: Send OFFER with ip 192.168.1.101
2020-03-29 08:28:22 [5] DHCPD: Recv REQUEST from 60:01:94:E1:B3:25
2020-03-29 08:28:23 [5] DHCPD: Send ACK to 192.168.1.101
2020-03-29 09:09:37 [5] DHCPD: Recv DISCOVER from 84:0D:8E:76:11:DA
2020-03-29 09:09:38 [5] DHCPD: Send OFFER with ip 192.168.1.100
2020-03-29 09:09:38 [5] DHCPD: Recv REQUEST from 84:0D:8E:76:11:DA
2020-03-29 09:09:38 [5] DHCPD: Send ACK to 192.168.1.100
2020-03-29 11:00:21 [5] DHCPD: Recv DISCOVER from 84:0D:8E:76:48:20
2020-03-29 11:00:21 [5] DHCPD: Send OFFER with ip 192.168.1.103
2020-03-29 11:00:21 [5] DHCPD: Recv REQUEST from 84:0D:8E:76:48:20
2020-03-29 11:00:22 [5] DHCPD: Send ACK to 192.168.1.103
2020-03-29 11:06:35 [5] DHCPD: Recv REQUEST from 00:1F:3A:13:FA:C6
2020-03-29 11:06:35 [5] DHCPD: Server id not found and request an invalid ip
2020-03-29 11:06:35 [5] DHCPD: Send NAK
2020-03-29 11:06:35 [5] DHCPD: Recv DISCOVER from 00:1F:3A:13:FA:C6
2020-03-29 11:06:35 [5] DHCPD: Send OFFER with ip 192.168.1.112
2020-03-29 11:06:35 [5] DHCPD: Recv REQUEST from 00:1F:3A:13:FA:C6
2020-03-29 11:06:35 [5] DHCPD: Send ACK to 192.168.1.112
2020-03-29 11:06:39 [5] DHCPD: Recv INFORM from 00:1F:3A:13:FA:C6
2020-03-29 11:10:13 [5] DHCPD: Recv INFORM from 00:1F:3A:13:FA:C6
2020-03-29 12:51:41 [5] DHCPD: Recv DISCOVER from 60:01:94:D6:4F:0B
2020-03-29 12:51:41 [5] DHCPD: Send OFFER with ip 192.168.1.102
2020-03-29 12:51:41 [5] DHCPD: Recv REQUEST from 60:01:94:D6:4F:0B
2020-03-29 12:51:42 [5] DHCPD: Send ACK to 192.168.1.102
2020-03-29 14:49:53 [5] DHCPD: Recv REQUEST from 00:1F:3A:13:FA:C6
2020-03-29 14:49:53 [5] DHCPD: Server id not found and request an invalid ip
2020-03-29 14:49:53 [5] DHCPD: Send NAK
2020-03-29 14:49:58 [5] DHCPD: Recv REQUEST from 00:1F:3A:13:FA:C6
2020-03-29 14:49:58 [5] DHCPD: Server id not found and request an invalid ip
2020-03-29 14:49:58 [5] DHCPD: Send NAK
2020-03-29 14:49:58 [5] DHCPD: Recv DISCOVER from 00:1F:3A:13:FA:C6
2020-03-29 14:49:58 [5] DHCPD: Send OFFER with ip 192.168.1.112
2020-03-29 14:49:58 [5] DHCPD: Recv REQUEST from 00:1F:3A:13:FA:C6
2020-03-29 14:49:58 [5] DHCPD: Send ACK to 192.168.1.112
2020-03-29 14:50:02 [5] DHCPD: Recv INFORM from 00:1F:3A:13:FA:C6

 

 

and here is the log when on "4G Preferred" mode ...total disconnection within 5 mins! although not recorded in the log file. Signal stays at 75% after disconnection. Router message "Unknown failure reason. Please make sure your configuration is correct."  Manual reboot/restart is needed!

 

What I also did, tried with another SIM card of the same carrier (4G Preferred/3G Only modes) with the exact same results.

 

2016-01-01 02:00:28 [5] 4G: init LTE module, set flowstat [enableDataLimit 0, enablePaymentDay 0, paymentDay 1, limitation 0, warningPercent 90]
2016-01-01 02:00:28 [5] 4G: LTE Module: profile num [1], default profile [1], active profile [0]
2016-01-01 02:00:28 [5] 4G: DM: profile num [1], default profile [1], active profile [0]
2016-01-01 02:00:29 [5] DHCPD: Recv DISCOVER from 60:01:94:E1:B3:25
2016-01-01 02:00:29 [5] System: Enable IPv4 SPI Firewall
2016-01-01 02:00:29 [5] System: Enable IPv6 SPI Firewall
2016-01-01 02:00:29 [5] DHCPD: Send OFFER with ip 192.168.1.101
2016-01-01 02:00:29 [5] DHCPD: Recv DISCOVER from 84:0D:8E:76:11:DA
2016-01-01 02:00:30 [5] DHCPD: Send OFFER with ip 192.168.1.100
2016-01-01 02:00:30 [5] DHCPD: Recv REQUEST from 60:01:94:E1:B3:25
2016-01-01 02:00:30 [5] DHCPD: Send ACK to 192.168.1.101
2016-01-01 02:00:30 [5] DHCPD: Recv DISCOVER from 84:0D:8E:76:48:20
2016-01-01 02:00:31 [5] DHCPD: Send OFFER with ip 192.168.1.103
2016-01-01 02:00:31 [5] DHCPD: Recv REQUEST from 84:0D:8E:76:11:DA
2016-01-01 02:00:31 [5] DHCPD: Send ACK to 192.168.1.100
2016-01-01 02:00:31 [5] DHCPD: Recv REQUEST from 84:0D:8E:76:48:20
2016-01-01 02:00:32 [5] DHCPD: Send ACK to 192.168.1.103
2016-01-01 02:00:35 [5] DHCPD: Recv DISCOVER from 60:01:94:D6:4F:0B
2016-01-01 02:00:36 [5] DHCPD: Send OFFER with ip 192.168.1.102
2016-01-01 02:00:36 [5] DHCPD: Recv REQUEST from 60:01:94:D6:4F:0B
2016-01-01 02:00:36 [5] DHCPD: Send ACK to 192.168.1.102
2016-01-01 02:00:36 [5] 4G: LTE internet connected.
2020-03-29 16:18:50 [5] DHCPD: Recv DISCOVER from 84:0D:8E:76:11:DA
2020-03-29 16:18:51 [5] DHCPD: Send OFFER with ip 192.168.1.100
2020-03-29 16:18:51 [5] DHCPD: Recv REQUEST from 84:0D:8E:76:11:DA
2020-03-29 16:18:51 [5] DHCPD: Send ACK to 192.168.1.100
2020-03-29 16:18:55 [5] DHCPD: Recv DISCOVER from 84:0D:8E:76:48:20
2020-03-29 16:18:55 [5] DHCPD: Send OFFER with ip 192.168.1.103
2020-03-29 16:18:55 [5] DHCPD: Recv REQUEST from 84:0D:8E:76:48:20
2020-03-29 16:18:56 [5] DHCPD: Send ACK to 192.168.1.103
2020-03-29 16:18:57 [5] DHCPD: Recv DISCOVER from 60:01:94:E1:B3:25
2020-03-29 16:18:58 [5] DHCPD: Send OFFER with ip 192.168.1.101
2020-03-29 16:18:58 [5] DHCPD: Recv REQUEST from 60:01:94:E1:B3:25
2020-03-29 16:18:58 [5] DHCPD: Send ACK to 192.168.1.101
2020-03-29 16:19:02 [5] DHCPD: Recv DISCOVER from 60:01:94:D6:4F:0B
2020-03-29 16:19:03 [5] DHCPD: Send OFFER with ip 192.168.1.102
2020-03-29 16:19:03 [5] DHCPD: Recv REQUEST from 60:01:94:D6:4F:0B
2020-03-29 16:19:03 [5] DHCPD: Send ACK to 192.168.1.102
2020-03-29 16:19:58 [5] DHCPD: Recv DISCOVER from 84:0D:8E:76:11:DA
2020-03-29 16:19:59 [5] DHCPD: Send OFFER with ip 192.168.1.100
2020-03-29 16:19:59 [5] DHCPD: Recv REQUEST from 84:0D:8E:76:11:DA
2020-03-29 16:19:59 [5] DHCPD: Send ACK to 192.168.1.100
2020-03-29 16:20:03 [5] DHCPD: Recv DISCOVER from 84:0D:8E:76:48:20
2020-03-29 16:20:03 [5] DHCPD: Send OFFER with ip 192.168.1.103
2020-03-29 16:20:03 [5] DHCPD: Recv REQUEST from 84:0D:8E:76:48:20
2020-03-29 16:20:04 [5] DHCPD: Send ACK to 192.168.1.103
2020-03-29 16:20:05 [5] DHCPD: Recv DISCOVER from 60:01:94:E1:B3:25
2020-03-29 16:20:06 [5] DHCPD: Send OFFER with ip 192.168.1.101
2020-03-29 16:20:06 [5] DHCPD: Recv REQUEST from 60:01:94:E1:B3:25
2020-03-29 16:20:06 [5] DHCPD: Send ACK to 192.168.1.101
2020-03-29 16:20:09 [5] DHCPD: Recv DISCOVER from 60:01:94:D6:4F:0B
2020-03-29 16:20:10 [5] DHCPD: Send OFFER with ip 192.168.1.102
2020-03-29 16:20:10 [5] DHCPD: Recv REQUEST from 60:01:94:D6:4F:0B
2020-03-29 16:20:10 [5] DHCPD: Send ACK to 192.168.1.102
2020-03-29 16:21:06 [5] DHCPD: Recv DISCOVER from 84:0D:8E:76:11:DA
2020-03-29 16:21:07 [5] DHCPD: Send OFFER with ip 192.168.1.100
2020-03-29 16:21:07 [5] DHCPD: Recv REQUEST from 84:0D:8E:76:11:DA
2020-03-29 16:21:07 [5] DHCPD: Send ACK to 192.168.1.100
2020-03-29 16:21:11 [5] DHCPD: Recv DISCOVER from 84:0D:8E:76:48:20
2020-03-29 16:21:11 [5] DHCPD: Send OFFER with ip 192.168.1.103
2020-03-29 16:21:11 [5] DHCPD: Recv REQUEST from 84:0D:8E:76:48:20
2020-03-29 16:21:12 [5] DHCPD: Send ACK to 192.168.1.103
2020-03-29 16:21:13 [5] DHCPD: Recv DISCOVER from 60:01:94:E1:B3:25
2020-03-29 16:21:14 [5] DHCPD: Send OFFER with ip 192.168.1.101
2020-03-29 16:21:14 [5] DHCPD: Recv REQUEST from 60:01:94:E1:B3:25
2020-03-29 16:21:14 [5] DHCPD: Send ACK to 192.168.1.101
2020-03-29 16:21:17 [5] DHCPD: Recv DISCOVER from 60:01:94:D6:4F:0B
2020-03-29 16:21:18 [5] DHCPD: Send OFFER with ip 192.168.1.102
2020-03-29 16:21:18 [5] DHCPD: Recv REQUEST from 60:01:94:D6:4F:0B
2020-03-29 16:21:18 [5] DHCPD: Send ACK to 192.168.1.102
2020-03-29 16:22:14 [5] DHCPD: Recv DISCOVER from 84:0D:8E:76:11:DA
2020-03-29 16:22:15 [5] DHCPD: Send OFFER with ip 192.168.1.100
2020-03-29 16:22:15 [5] DHCPD: Recv REQUEST from 84:0D:8E:76:11:DA
2020-03-29 16:22:15 [5] DHCPD: Send ACK to 192.168.1.100
2020-03-29 16:22:19 [5] DHCPD: Recv DISCOVER from 84:0D:8E:76:48:20
2020-03-29 16:22:19 [5] DHCPD: Send OFFER with ip 192.168.1.103
2020-03-29 16:22:19 [5] DHCPD: Recv REQUEST from 84:0D:8E:76:48:20
2020-03-29 16:22:20 [5] DHCPD: Send ACK to 192.168.1.103
2020-03-29 16:22:21 [5] DHCPD: Recv DISCOVER from 60:01:94:E1:B3:25
2020-03-29 16:22:22 [5] DHCPD: Send OFFER with ip 192.168.1.101
2020-03-29 16:22:22 [5] DHCPD: Recv REQUEST from 60:01:94:E1:B3:25
2020-03-29 16:22:22 [5] DHCPD: Send ACK to 192.168.1.101
2020-03-29 16:22:25 [5] DHCPD: Recv DISCOVER from 60:01:94:D6:4F:0B
2020-03-29 16:22:26 [5] DHCPD: Send OFFER with ip 192.168.1.102
2020-03-29 16:22:26 [5] DHCPD: Recv REQUEST from 60:01:94:D6:4F:0B
2020-03-29 16:22:26 [5] DHCPD: Send ACK to 192.168.1.102
2020-03-29 16:23:22 [5] DHCPD: Recv DISCOVER from 84:0D:8E:76:11:DA
2020-03-29 16:23:23 [5] DHCPD: Send OFFER with ip 192.168.1.100
2020-03-29 16:23:23 [5] DHCPD: Recv REQUEST from 84:0D:8E:76:11:DA
2020-03-29 16:23:23 [5] DHCPD: Send ACK to 192.168.1.100
2020-03-29 16:23:27 [5] DHCPD: Recv DISCOVER from 84:0D:8E:76:48:20
2020-03-29 16:23:27 [5] DHCPD: Send OFFER with ip 192.168.1.103
2020-03-29 16:23:27 [5] DHCPD: Recv REQUEST from 84:0D:8E:76:48:20
2020-03-29 16:23:28 [5] DHCPD: Send ACK to 192.168.1.103
2020-03-29 16:23:29 [5] DHCPD: Recv DISCOVER from 60:01:94:E1:B3:25
2020-03-29 16:23:30 [5] DHCPD: Send OFFER with ip 192.168.1.101
2020-03-29 16:23:30 [5] DHCPD: Recv REQUEST from 60:01:94:E1:B3:25
2020-03-29 16:23:30 [5] DHCPD: Send ACK to 192.168.1.101
2020-03-29 16:23:33 [5] DHCPD: Recv DISCOVER from 60:01:94:D6:4F:0B
2020-03-29 16:23:34 [5] DHCPD: Send OFFER with ip 192.168.1.102
2020-03-29 16:23:34 [5] DHCPD: Recv REQUEST from 00:1F:3A:13:FA:C6
2020-03-29 16:23:34 [5] DHCPD: REQUEST ip 922ba8c0 is not in the address pool
2020-03-29 16:23:34 [5] DHCPD: Send NAK
2020-03-29 16:23:34 [5] DHCPD: Recv REQUEST from 60:01:94:D6:4F:0B
2020-03-29 16:23:35 [5] DHCPD: Send ACK to 192.168.1.102
2020-03-29 16:23:35 [5] DHCPD: Recv DISCOVER from 00:1F:3A:13:FA:C6
2020-03-29 16:23:35 [5] DHCPD: Send OFFER with ip 192.168.1.112
2020-03-29 16:23:35 [5] DHCPD: Recv REQUEST from 00:1F:3A:13:FA:C6
2020-03-29 16:23:35 [5] DHCPD: Send ACK to 192.168.1.112
2020-03-29 16:23:39 [5] DHCPD: Recv INFORM from 00:1F:3A:13:FA:C6
 

I've been reading your posts and thank you @Nickatsikas and @Creeper for the workaround of setting the connection to 3G. I have yet to try this with my router but have you guys done speed test with 4G vs 3G? How's the download and upload speeds looking like?

 

Cheers!

@Bonn

 

You are welcome :)

 

3G is very much slower than 4G for me, It depends on your ISP.

 

I get 7 or 8 Mbps Download and 1.2 Mbps Upload speed. I cannot use it to stream anything on 3G because the upload speed is too slow. On 4G I get 20 Mbps Download and 22 Mbps Upload speed, so that a huge difference.

 

4G has become unsuable for me, the band keep changing to a slow 4G bands with slow download and upload speed every few minute and sometimes it lasts for a few hours if I'm lucky. It doesn't want to stay locked on the 3 network bar 4G band that gives good download and upload speed for some reason, It always switches to 2 network bar or 1 network bar bands and when that happens the internet becomes very unstable on 4G and the speed starts to crawl till I can no longer open any pages but when I restart the router and it connects to the 2 or 1 network bar bands the internet works fine with slower download or upload speed so its not the ISP problem but the router's problem. So without the feature to lock on to the 4G bands we want this router is useless. And I don't think the band lock or band selection feature will be added soon enough. I'm already planning on getting the Huawei Router which has the feature but I'm on a Lockdown and Amazon won't ship items other than what is considered essential items. So I'm stuck with the router for now.

@Bonn 

 

Hi and welcome,

 

4G download speed to me ...when 4G ability on router really works and shows 2 LED bars - 75% signal strength (via 5Ghz Wifi connection) using mobile phone reads 60+ Mbps download and 15+ Mbps upload but all of a sudden disconnects and manual restart/reboot is needed...  it is a pity!

 

3G reads like 10-12 max download and 4-5 max upload but download rate is not stable, it goes down to 1-2 and up again continuously, maybe depends on device, ISP network or traffic, not sure, but with MR400 physical connection to ISP on 3G is much more stable like Creeper explained.