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isbou
2014-10-23, 01:20 AM
Hi all, Hope every one is fine, I have an issue with some SIMs, indeed, some SIMs of my subscribers can't perform USSD code, when try this they get follow error :'Invalid Service Code', We investigated many times but not able to find a solution for that, could you please help me to fix this issue? Thanks in advance.
isbou
2014-10-23, 01:27 AM
Note that please, the USSD for balance check is working fine.
baby2
2014-10-23, 02:50 AM
Did you checking the class of SIM?

class 10-15 for operator use
isbou
2014-10-23, 05:15 PM
Can you explain more how class of SIM can help?
isbou
2014-10-28, 05:44 PM
Dear Wire free aliance members,
could you please help me here? Thanks in advance.