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With Online AT Command Tester tool, you can find the GPRS registration status of the device.
Users can also test the AT command under the ‘Command Mode’ tab of the AT Command Tester.
Try this script included in AT Command Tester Tool.
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//Script-at_cgreg.at
//Test AT+CGREG AT command
//AT+CGREG returns network registration status of device
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//List of supported write values for AT+CGREG
AT+CGREG=?
//Get current registration status
//If there is any error, CME error code is returned
AT+CGREG?
//Configure to return unsolicited result code when network registration
//is disabled
AT+CGREG=0
//Configure to return unsolicited result code with when network registration is enabled
AT+CGREG=1
//Configure to return unsolicited result code when there is change in
//network registration status or change of network cell
AT+CGREG=2
Output of above script in AT Command Tester Tool.
AT+CGREG=?
+CGREG: (0-2)
OK
AT+CGREG?
+CGREG: 0,1
OK
AT+CGREG=0
OK
AT+CGREG=1
OK
AT+CGREG=2
OK