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EM12-G Stuck on Verizon; won't switch to other carriers.

Posted: Tue Jun 30, 2020 8:49 am
by prdg79
Hi folks,

My EM12 has been working fine on AT&T (ipad) and then T-mobile. I unfortunately decided to try Verizon. After trying everything I could find Wireless Joint, I decided to go back to AT&T.
However, I cannot get the AT&T or even my T-mobile sim cards to work.
The problem appears to be that the modem. The CGDCONT 4 & 5 appear to be stuck on vzapp and vzwemergency.
ATT-error.jpg
The folks on the Facebook Wireless Joint recommended running
AT+CGDCONT=2
AT+CGDCONT=3
AT+CGDCONT=4
AT+CGDCONT=5
AT+CGDCONT=16

All of these worked but AT+CGDCONT=3. It returns an error.
AT+CGDCONT-3.JPG
It did clear the vzwapp and vzwemergency, however, I am still unable to connect :cry: .
AT&T-ERROR-afterCGDCONT.JPG
Is it because CGDCONT 3 is still on SOS :?:
Is there something wrong with the EM12-g :?:

Any help would be greatly appreciated!!!!

Re: EM12-G Stuck on Verizon; won't switch to other carriers.

Posted: Wed Jul 01, 2020 5:56 pm
by BillA
Looks like your modem's NVM doesn't get refreshed for some reason during flashing, but that's ok, let's take it one step at a time. Even so, the router usually looks at APN slot#1, while the Verizon APN's are on slots# 2-5.

First flash the modem with the latest firmware.
Next, with the sim card removed send the following AT commands from the router's menu Modem > Miscellaneous > AT-Command Terminal.

Copy and paste each command one at a time, and make sure you get an "OK" response after each command:

Code: Select all

AT+QPRTPARA=3
Wait a minute, restart the router, then enter these commands:

Code: Select all

AT+QCFG="nwscanmode",3,1
AT+QCFG="roamservice",1,1
AT&W
Turn off the router, insert your ATT or Tmobile sim card, set the proper APN/TTL, wait a few minutes then go to modem status and copy and paste all that info here. Do not do anything else, let's see the signal and connection status.