I have a nasty issue: I try to use a BG95-M3 with an EVB.
Whenever I unlocked the SIM the screen freezes, as if the USB-UART is not active anymore.
When requesting the status the USB sockets are still there but no interaction is possible.
I removed the SIM-lock and now the unit goes directly into this mode.
No possibility to send anything to the socket.
I tried the SIM in an android smartphone, it works perfect.
enabling the SIM-lock again brings back the possibility to send AT commands
but sending AT+CPIN=“pin#” kills the socket