Registering the device with the network is required before establishing a data connection. The device can be configured for manual or automatic registration.
With Online AT Command Tester tool, you can network registration status of the device.
To check the registration status of the device,
‘+CGREG:0,1′ implies that the device is registered and it is in the nime network (ie not roaming)
Results of network registration status commans,
0,0 – not registered, MT is not currently searching a new operator to register to
0,1 – Registered, home network
0,2 – Searching
0,3 – Registration denied
0,5 – Registered, non-home network
Enable unsolicited result code for registration.
AT+CGREG=1 –> Registration status only
AT+CGREG=2 –> Registration status and service location area and cell