Specifications
SIM900 AT Command Manual       
SIM900_AT Command Manual_V1.03  54  12/24/2010 
AT+CGMM=?  OK 
Response 
TA returns product model identification text. 
<model> 
OK 
Execution 
Command 
AT+CGMM 
Parameter 
<model> product model identification text 
Reference 
GSM 07.07 [13] 
Note 
3.2.10 AT+CGMR Request TA Revision Identification of Software Release 
AT+CGMR Request TA Revision Identification of Software Release 
Test Command 
AT+CGMR=? 
Response 
OK 
Response 
TA returns product software version identification text. 
Revision: <revision> 
OK 
Execution 
Command 
AT+CGMR 
Parameter 
<revision> product software version identification text 
Reference 
GSM 07.07 [13] 
Note 
3.2.11 AT+CGSN Request Product Serial Number Identification (Identical with +GSN) 
AT+CGSN Request Product Serial Number Identification (Identical with +GSN) 
Test Command 
AT+CGSN=? 
Response 
OK 
Response 
see +GSN 
<sn> 
OK 
Execution 
Command 
AT+CGSN 
Parameter 
<sn> International mobile equipment identity (IMEI) 
Reference 
GSM 07.07 [13] 
Note 










