this SIM5218 AT command manual - Cooking Hacks

SIM5218 Serial AT Command Set
AT+CGREG
Write Command
AT+CGREG=
Execution Command
AT+CGREG
+CGREG: ,[,,]
OK
Responses
OK
Responses
Set default value:
OK
Defined values
0 – disable network registration unsolicited result code
1 – enable network registration unsolicited result code +CGREG:
2 – there is a change in the ME network registration status or a change of the network cell:
+CGREG: [,,]
0 – not registered, ME is not currently searching an operator to register to
1 – registered, home network
2 – not registered, but ME is currently trying to attach or searching an operator to register
to
3 – registration denied
4 – unknown
5 – registered, roaming
Two byte location area code in hexadecimal format(e.g.”00C3” equals 193 in decimal).
Two byte cell ID in hexadecimal format.
Examples
AT+CGREG=
+CGREG: (0-1)
OK
AT+CGREG
+CGREG: 0,0
OK
18.15 AT+CGSMS Select service for MO SMS messages
Description
SIM5218_Serial _ATC_V1.36 342
5/15/2012