[SOLVED] SIM900b AT command problem - ATD*566# !! help needed!!

[mahmudur.rahman]

Hi,
i am working on SIM900b GSM module. in our country we have to check our balance using this command - *566# (grameen phone). it is possible to do for any operator through any mobile. but i cant do it with SIM900b. I tried the following command - ATD*566#
but it shows error!!!
is there are any other way? do i have to change any settings?
by the way, i can make voice call and send sms.

 

[FvM]

Read the at command manual, particularly about +CUSD command, unstructured supplementary service data. Or search previous threads with keyword CUSD.

 

[mahmudur.rahman]

ohh! thnx... worked like charm!!

i used
at+cusd=1,"*566#"\r

but, how can i exit from CUSD menu, cant find the exit command. is there any command to end the session?

 

[mahmudur.rahman]

... found it ....
at+cusd=2\r

 

[RaselDC]

at+cusd=1,"*566#"\r
i use it , but error , pls help
my SIM is use for balance Recharge .

---------- Post added at 10:41 ---------- Previous post was at 10:38 ----------

at+cusd=1,"*566#"\r
i use it , but error , pls help
my SIM is used for balance Recharge .