Hello @Stevemace
Pls make sure the antennas and the IPEX cables of the M2 board are connected properly and firmly
When the problem happens again, run the following commands one by one to check the modem status and the APN config.
AT+CFUN?
AT+COPS?
AT+CREG?
AT+CPIN?
AT+QENG="servingcell"
AT+CGDCONT?
AT+CGCONTRDP
Also, export the system log from the router. And then PM me the relevant info to check the issue. Thanks