@Kevin_Z Hello Kevin, 
I have the same issue, it always disconnecting every week. when it disconnected, i always reboot it with unplug and plug again. do you have any solutions for that? i dont want to reboot it manually, reboot function on the system didn't work.

@Kevin_Z 

Hello,

I have this disconnecting issue once or twice a day for a year now with MR 600 which I changed for MR 6400 V5 EU but still the same disconnecting issue. I also tried with my M7200 mifi router which also got disconnecte.

The only solution is a reboot. It seems to happen when internet is being used more intensely (streaming, video call, download...).
It seems to be coming from my SIM card carrier (Free Mobile, France). Manual band selection does not change anything.
The only thing that changes between connected and disconnected LTE is the change of IP address (see print screens below)

Do you have any advice on how to fix this issue without having to manually reboot the router every time?

Thanks!

@Kevin_Z The router disconnects all devices.

I'm seeing "No Internet Access" after few seconds router terminates the connection with all device.

I have to connect the router manually again.

Sometimes I don't see "No Internet Access" but my all device is disconnected from router.

I'm locked at band 1 and set LTE only seems the problem with router logic.

@Kevin_Z 

My 3/4G TL-MR6400 keeps disconnecting.

Place: Hungary

Networker: Telenor Hungary

Mode: inserted SIM card

Disconnecting error: weekly

Waiting for the solutions!

Regards, Daniel

  @Pierre_F 

I have the same irritating issue with M7200!

It's either "connected without Internet" when I link my phone or tab or both..; though 4G coverage is full.

Or my devices keep disconnecting from M7200 each 3 to 10 seconds when they're connected and Internet is available! Imagine the situation!!

This modem/ 4G router will surely bring me a heartache at the end. I'm sick searching for useless  solutions. 😑

  @Kevin_Z 

I think there is a connection between dropping the 4g+ signal, then not being able to reconnect to it. Every time I have a problem with the modem, it has dropped from 4G+ to 3G first. I spotted a while ago that it generally slowed down prior to locking up. Now, if I see the speed drop, I log on to the router and re-boot it. It then comes back to 4G+.

I tried the suggested 'fix' of applying '4G only' setting, but this led to the router dropping out completely and needing a physical reboot, it wouldn't even let me log on from a computer. I've tried this on about three occasions and never lasted a day.

I have no idea if this is technically possible, but it is like, the router briefly loses the 4G+ signal, so connects to 3G, but then locks itself up when it attempts to rejoin 4G+. Once rebooted, either remotely or physically, it remains on 4G+ for a few hours (probably six hours is the minimum I've had before another reboot, generally, the next day).

It has got to the stage where if I'm streaming a film, I'll reboot it before I start watching, so that it doesn't go down mid-way! 

Regardless of 'why', it is very frustrating, and I'm very unlikely to replace it with anything else made by TP-Link. 

  @iomkeith 

Hi, may I know the model number, hardware and firmware version of your 4G router?

When using 4G Preferred, are you still able to login the web interface when the problem happens without rebooting?

If so, when it happens next time, please don't reboot it,  share with us screenshot of Advanced->Status page and Advanced->Network->Internet page, then go to Advanced->System Tools->System Log page to save a system log for analysis.

In addition, may I know who your SIM card carrier is? and was it working stable before?