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SIM900 Disable Incomming calls

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hi,
i want to use sim900 as for SMS and GPRS, and want to disable all incomming calls. Is there any command for this.
 

Each Network operator has some code for incoming bar, outgoing bar. As per I know for GSM it is *31*0000# (incoming bar) or *33*0000#(outgoing bar). Here 0000 is the password. you can change it also.

just "ATD*31*0000#\r\n"..
 
rongo024 said:
Each Network operator has some code for incoming bar, outgoing bar. As per I know for GSM it is *31*0000# (incoming bar) or *33*0000#(outgoing bar). Here 0000 is the password. you can change it also.

just "ATD*31*0000#\r\n"..
Click to expand...

It doesn't works with my SIM300 Modem.

- - - Updated - - -

rongo024 said:
Each Network operator has some code for incoming bar, outgoing bar. As per I know for GSM it is *31*0000# (incoming bar) or *33*0000#(outgoing bar). Here 0000 is the password. you can change it also.

just "ATD*31*0000#\r\n"..
Click to expand...

It doesn't works with my SIM300 Modem.
 

I tested this command in Bangladesh.. I works.. But my module was SIM548C
 

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