Specifications
SIM900 AT Command Manual       
SIM900_AT Command Manual_V1.03  144  12/24/2010 
Response 
OK 
If error is related to ME functionality: 
+CME ERROR: <err> 
Write Command 
AT+CCPD=<mo
de> 
Parameter 
<mode> 
0 disable to present alpha string 
1 enable to present alpha string 
Reference Note 
6.2.34 AT+CGID Get SIM Card Group Identifier 
AT+CGID Get SIM Card Group Identifier 
Response 
+GID: <gid1> <gid2> 
OK 
If error is related to ME functionality: 
+CME ERROR: <err> 
Execution 
Command 
AT+CGID 
Parameters 
<gid1> integer type of SIM card group identifier 1 
<gid2> integer type of SIM card group identifier 2 
Reference Note 
If the SIM supports GID files, the GID values will be retuned. Otherwise 
0xff is retuned. 
6.2.35 AT+MORING Show State of Mobile Originated Call 
AT+MORING Show State of Mobile Originated Call 
Response 
+MORING: (0,1) 
OK 
Test Command 
AT+MORING=? 
Parameter 
See Write Command 
Response 
+MORING: <mode> 
OK 
Read Command 
AT+MORING? 
Parameter 
See Write Command 
Write Command  Response 










