Specifications

SIM900 AT Command Manual
1 MT buffer of unsolicited result codes defined within this
command is flushed to the TE when <mode> 1 or 2
is entered
Reference Note
7.2.10 AT+CGREG Network Registration Status
AT+CGREG Network Registration Status
Response
+CGREG: (list of supported <n>s)
OK
Test Command
AT+CGREG=?
Parameters
See Write Command
Response
+CGREG: <n>,<stat>[,<lac>,<ci>]
OK
If error is related to ME functionality:
+CME ERROR: <err>
Read Command
AT+CGREG?
Parameters
See Write Command
Response
OK
ERROR
Write Command
AT+CGREG=
<n>
Parameters
<n> 0 disable network registration unsolicited result code
1 enable network registration unsolicited result code
+CGREG:<stat>
2 enable network registration and location information
unsolicited result code +CGREG: <stat>[,<lac>,<ci>]
<stat>
0 Not registered, MT is not currently searching an
operator to register to
The GPRS service is disabled, the UE is allowed to attach
for GPRS if requested by t he user
1 Registered, home network
2 Not registered, but MT is currently trying to attach or
SIM900_AT Command Manual_V1.03 166 12/24/2010