Specifications

SIM900 AT Command Manual
SIM900_AT Command Manual_V1.03 134 12/24/2010
OK
Parameters
See Write Command
Response
OK
ERROR
If error is related to ME functionality:
+CME ERROR: <err>
Write Command
AT+CCVM=<vm
number>[,<alpha
string>]
Parameters
<vm number> string type (string should be included in quotation
marks) -The voice mail number to write to the SIM
<alpha string> string type (string should be included in quotation
marks) -The alpha-string to write to the SIM
Reference Note
6.2.20 AT+CBAND Get and Set Mobile Operation Band
AT+CBAND Get and Set Mobile Operation Band
Response
+CBAND: (list of supported <op_band>s)
OK
Test Command
AT+CBAND=?
Parameter
See Write Command
Response
+CBAND: <op_band>[,<ALL_BAND>]
OK
Read Command
AT+CBAND?
Parameter
See Write Command
Response
OK
If error is related to ME functionality:
+CME ERROR: <err>
Write Command
AT+CBAND=<o
p_band>
Parameter
<op_band> A string parameter which indicate the operation band.
And the following strings should be included in quotation
marks.
PGSM_MODE