Specifications
SIM900 AT Command Manual       
SIM900_AT Command Manual_V1.03  86  12/24/2010 
OK 
If error is related to ME functionality: 
+CME ERROR: <err> 
Parameters 
<numericn> string type (string should be included in quotation marks): 
operator in numeric format (see +COPS) 
<alphan>  string type (string should be included in quotation marks): 
operator in long alphanumeric format (see +COPS) 
Reference 
GSM 07.07 [13] 
Note 
3.2.46 AT+CFUN Set Phone Functionality 
AT+CFUN Set Phone Functionality 
Response 
+CFUN: (list of supported <fun>s),(list of supported <rst>s) 
OK 
If error is related to ME functionality: 
+CME ERROR: <err> 
Test Command 
AT+CFUN=? 
Parameters 
See Write Command 
Response 
+CFUN: <fun> 
OK 
If error is related to ME functionality: 
+CME ERROR: <err> 
Read Command 
AT+CFUN? 
Parameters 
See Write Command 
Response 
OK 
If error is related to ME functionality: 
+CME ERROR: <err> 
Write Command 
AT+CFUN=<fun
>,[<rst>] 
Parameters 
<fun> 0 minimum functionality 
1  full functionality (Default) 
4 disable phone both transmit and receive RF circuits 
<rst> 0 Do not reset the MT before setting it to <fun> power 
level 
1 
Reset the MT before setting it to <fun> power level










