Help Cellone SIM working but Airtel fail to register.

[gaurab485]

Hi,

I need help with my Nexus S. I am from India and the issue is with BSNL and AIRTEL networks.

The phone works properly with a BSNL Cellone SIM. But when a Airtel SIM is inserted the phone fails to register on Airtel network and it reduces to "no service, only emergency calls".

I had taken the phone to Airtel customer care and they tried with different SIM cards but all with same result. It must be some settings.

Can anyone help me on this, please?

Thanks,
Gaurab.