Quectel M35 Command Manual page 58

Read Command
AT+CREG?
Write Command
AT+CREG=<n>
Reference
GSM 07.07
Parameter
<n> 0
1
2
<stat> 0
1
2
3
4
5
<lac> String type; two byte location area code in hexadecimal format
<ci> String type; two byte cell ID in hexadecimal format
NOTES
Unsolicited result code
If <n>=1 and there is a change in the ME network registration status +CREG: <stat>
If <n>=2 and there is a change in the ME network registration status or a change of the network cell:
+CREG: <stat>[,<lac>,<ci>]
Example
AT+CREG=1
M35_AT_Commands_Manual
Response
TA returns the status of result code presentation and an
integer <stat> which shows whether the network has
currently indicated the registration of the ME. Location
information elements <lac> and <ci> are returned only when
<n>=2 and ME is registered in the network.
+CREG: <n>,<stat>[,<lac>,<ci>]
OK
If error is related to ME functionality:
+CME ERROR: <err>
Response
TA controls the presentation of an unsolicited result code
+CREG: <stat> when <n>=1 and there is a change in the ME
network registration status.
OK
Disable network registration unsolicited result code
Enable network registration unsolicited result code +CREG: <stat>
Enable network registration unsolicited result code with location information
Not registered, ME is not currently searching a new operator to register to
Registered, home network
Not registered, but ME is currently searching a new operator to register to
Registration denied
Unknown
Registered, roaming
Confidential / Released
GSM/GPRS Module
M35 AT Commands Manual
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