The EG912U does not remain connected to Verizon in the USA.
It works for a few minutes, then the module seems to reset.
I get the impression that it is being rejected by the network.
The same modem works reliably on other networks
(specifically T-mobile/iot.1nce.net)
Is this a certification issue?
It might be an issue with the APN or the authentication.
I’m using vzwinternet, as in:
AT+CGDCONT=1,“ip”,“vzwinternet”
I’ve also tried:
AT+CGDCONT=3,“ip”,“vzwinternet”
as Verizon default to using cid #3 in many cases.
The same sim card works reliably in a SIMcom A7672G
among others.
If it were an authentication problem, why would it transfer data for a few minutes before failing? When it fails, the EG912U disconnects AND all the USB endpoints reenumerate.
The EG912U is rock solid on T-mobile, but we need Verizon for its superior rural coverage.
Please provide the version of your current firmware.
Current running:
AT+QGMR
EG912UGLAAR03A15M08_01.200.01.200
I have sent you the latest firmware version. Please update it and try again.
Sorry, I do not see any attachment. No email with firmware either.
How did you send it?
Please send firmware to my gmail address.
Thank you!
I have sent it to your email address genosensor@gmail.com, or you can check your spam folder.
It was flagged as spam 
Got it now. Thanks.