My Airtel Number is 9980228606 and for the last 6 months I am not able to see last call cost & balance on my screen after Making calls, Sending SMS or usings GPRS. I am using android 2.3.4 on LG P690. I have removed the SIM and checked it in a Motorola L9 - same problem persists.

The customer care has been of no help so far. Any idea how to fix it?

Thanks in advance.