I have the following issue:
Telia SIM card with pin code check disabled => SARA R4 410M 02B boots up with only one serial port on the USB interface, it is not responding to AT command either on USB or UART interface.
Telia SIM card (same card) with pin check enabled boots ok, and the pin can be set via AT commands on the second serial channel that is enumerated.
This is tested both with the modem connected to a Linux host machine and also in our embedded system with usb driver from HCC embedded.
The same SIM card works fine in both cases with the N211 modem.
Has anyone seen the same issue?