Specifications

SIM900 AT Commands Set
SIM900_ATC_V1.01 136 23.06.2010
6.2.19 AT+CBAND Get and Set Mobile Operation Band
AT+CBAND Get and Set Mobile Operation Band
Response
+CBAND: <op_band>[,<ALL_BAND>]
OK
Read Command
AT+CBAND?
Parameter
See Write Command
Response
+CBAND: (list of supported <op_band>s)
OK
Test 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
DCS_MODE
PCS_MODE
EGSM_DCS_MODE
GSM850_PCS_MODE
ALL_BAND
Reference Note
Radio settings following updates are stored in non-volatile memory.
6.2.20 AT+CHF Configure Hands Free Operation
AT+CHF Configure Hands Free Operation
Response
+CHF: <ind>,<state>
OK
Read Command
AT+CHF?
Parameters
See Write Command.