Hi, we have a custom embedded Linux board with the EM7455 module. The module can detect the AT&T and T-Mobile SIM cards reliably, but not the Verizon SIM card. It would show was SIM not inserted when I check using the at+cpin? command.
The Sierra Wireless 5302357-2 eval kit does not have this problem.
Has anyone experienced this issue?
Can we get the layout file and schematics for the Sierra Wireless eval kit to compare with our board?