Note the description of CREG in the AT Command user guide:
You can’t use this command to enable or disable GSM registration, only view indications on the registration status. Use AT+CFUN to set the modem functionality.
Note the description of CREG in the AT Command user guide:
You can’t use this command to enable or disable GSM registration, only view indications on the registration status. Use AT+CFUN to set the modem functionality.