Specifications

SIM900 AT Command Manual
SIM900_AT Command Manual_V1.03 148 12/24/2010
Old password and length should be 8.
<newpwd> string type(string should be included in quotation marks).
New password and length should be 8.
Reference Note
Default value of <oldpwd> is "12345678".
If module is locked to a specific SIM card through AT+CLCK and
password lost or SIM state is PH-SIM PUK, user can use the super
password to unlock it.
It is not supported temporarily.
6.2.41 AT+EXUNSOL Enable or Disable Proprietary Unsolicited Indications
AT+EXUNSOL Enable or Disable Proprietary Unsolicited Indications
Response
+EXUNSOL: (list of supported <exunsol>s)
OK
Test Command
AT+EXUNSOL
=?
Parameters
See Write Command
Response
OK
If error is related to ME functionality:
+CME ERROR: <err>
Write Command
AT+EXUNSOL=
<exunsol>,<mod
e>
Parameters
<exunsol> string type(string should be included in quotation marks).
values are currently reserved by the present document
"SQ" Signal Quality Report
Displays signal strength and channel bit error rate (similar
To AT+CSQ) in form +CSQN: <rssi>,<ber>when values change.
<mode>
0 disable
1 enable
2 query
Reference Note
6.2.42 AT+CGMSCLASS Change GPRS Multislot Class
AT+CGMSCLASS Change GPRS Multislot Class