Chapter 6 – Network Service Commands
Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I) 33
Description: This command is used by the application to ascertain the registration status of the product.
Values: <mode>
0 Disable network registration unsolicited result code (default)
1 Enable network registration code result code +CREG: <stat>
2 Enable network registration and location information unsolicited result code +CREG:
<stat>,<lac>,<ci> if there is a change of network cell.
<stat>
0 Not registered, ME is not currently searching for a new operator.
1 Registered, home network.
2 Not registered, ME currently searching for a new operator to register to.
3 Registration denied.
4 Unknown.
5 Registered, roaming.
<lac>: String type; two byte location area code in hexadecimal format (e.g., “00C3” equals 195 in
decimal).
<ci>: String type; two byte cell ID in hexadecimal format.
Syntax: Command Syntax: AT+CREG= <mode>
Response syntax: +CREG: <mode>, <stat> [ ,<lac>,<ci> ] for AT+CREG? Command only
Command Possible responses
AT+CREG?
+CREG: <mode>,<stat>
OK
Note: As defined here-above
AT+CREG=0
Note: Disable network registration unsolicited result code OK
Note: Command valid
AT+CREG=1
Note: Enable network registration unsolicited result code OK
Note: Command valid
AT+CREG=2
Note: Enable network registration and location
information unsolicited result code
OK
Note: Command valid
AT+CREG=? +CREG: (0-2)
Note: 0,1,2 <mode> values are supported
Description: This command allows a new or modified operator to be added to the PLMN list. Up to 10 PLMNs can be
created and stored in the flash memory.
Please note that if two entries with the same network (MCC+MNC), but have different names, are
entered, the first entry will be used.
Values: <mode>
0 Delete
1 Write
2 Read
<loc>
Location. If this parameter is not filled with <mode>=1, the location will be the first emply one.
<NumOper>
Operator in numeric format.
<short name>
The short name of the PLMN.
<long name>
The long name of the PLMN.