Airtel — calls getting disconnected automatically

Address:

Jammu, Jammu and Kashmir

During a call after 30 to 40 seconds the call gets disconnected automatically... It is really irritating. I am unable to talk to anybody. I am unable to onow the casuse of the problem. I don't know why it is happening. I tried tofind out a solution to this problem but i could not. It's really implrtant to get this problem resolved be causethe mobike phone isof no use if it is not able to make a call. Help me out with this... It is really urgent... Please resolve this issue