Region : Argentina

Model : TL-MR3220

Hardware Version : V2

Firmware Version :

ISP :

Problem:
1.I bought this modem considering good customer services mentioned in flipkart.com, but now i feel that they are fake reviews. here what experienced.
I tried calling TP Link customer call on 18002094168, the number always rings & then disconnected.
[*]I have also sent an email to support but they even did not acknowledged & replied to my mail.
[*]

2. My Data card is listed in supported (reliance netconnect+ ZTE AC 2736) but shown as Identified but signal strength always shows 0%.
3. got this error sw3GMobileCmdReq 319 mobileFormatCmd error. & then it shows disconnected & then identified again & disconnected, this cycle goes on.

Please let me know if any 1 is using TP-Link 3420 & reliance netconnect+ ZTE AC 2736 data card, which firmware version is supported for TPLink 3420 model, thank you in advanced, waiting for experts to suggest solution.

I got below error in log.
1st day 00:48:40 3G/4G INFO Now disconnect times is 1
1st day 00:48:40 3G/4G NOTICE 3G Modem connecting error, please check the dial number and APN.
1st day 00:48:40 3G/4G INFO sw3GMobileCmdReq 319 mobileFormatCmd error
1st day 00:49:01 3G/4G INFO Run 3G dial cmd: pppd 3g 1 /dev/ttyUSB0 115200 connect "chat -s -v -f /etc/ppp/c
1st day 00:49:22 3G/4G INFO Now disconnect times is 2
1st day 00:49:22 3G/4G NOTICE 3G Modem can't connect to network, now reset itself to try connecting again.
1st day 00:49:22 3G/4G NOTICE Reset the 3G modem, please wait.
1st day 00:49:23 3G/4G INFO handle_card start
1st day 00:49:23 3G/4G INFO LTE Modem = 0, modemStatus = 1, targetVendorID = 0x0000, targerProductID = 0x0000
1st day 00:49:24 3G/4G INFO sw3GMobileCmdReq 319 mobileFormatCmd error
1st day 00:49:25 3G/4G INFO LTE Modem = 0, modemStatus = 0, targetVendorID = 0x0000, targerProductID = 0x0000