Enter PIN
AT+CPIN=”[pin]”
Enter PUK
AT+CPIN=”[puk]”,”[new pin]”
PIN state
AT+CPIN?
Register network
AT+CREG?
(“0,1” means logged in and “0,2” means logged out)
Show network
AT+COPS?
Show signal strength
AT+CSQ?
(somewhere between 0 and 31.99)
Data call
ATD912555666
Voice call
ATD912555666;
Enter SMS center
AT+CSCA=”+351912333444″
Set to text mode and send SMS
AT+CMGF=1
AT+CMGS=”+351912555666″
Please call office^Z
Preferred message service
AT+CPMS?
(+CPMS: [mem1],[used1],[total1],[mem2],[used2],[total2],…)
Select SIM card messages
AT+CPMS=”SM”,”SM”,”SM”
Select memory messages
AT+CPMS=”ME”,”ME”,”ME”
Read SMS on memory number n
AT+CMGR=[n]
Delete SMS on memory number n
AT+CMGD=[n]