Specifications

SIM900 AT Commands Set
SIM900_ATC_V1.01 119 23.06.2010
Response
+CSMS: <mt>,<mo>,<bm>
OK
If error is related to ME functionality:
+CME ERROR: <err>
Write Command
AT+CSMS=
<service>
Parameters
<service> 0 GSM 03.40 and 03.41 (the syntax of SMS AT
commands is compatible with GSM 07.05 Phase 2
version 4.7.0; Phase 2+ features which do not require
new Command syntax may be supported (e.g. correct
routing of messages with new Phase 2+ data coding
schemes))
1 GSM 03.40 and 03.41 (the syntax of SMS AT
commands is compatible with GSM 07.05 Phase 2+
version; the requirement of <service> setting 1 is
mentioned under corresponding command descriptions)
<mt> Mobile Terminated Messages:
0 Type not supported
1 Type supported
<mo> Mobile Originated Messages:
0 Type not supported
1 Type supported
<bm> Broadcast Type Messages:
0 Type not supported
1 Type supported
Reference
GSM 07.05
Note