BSNL Prepaid Mobile Connection — Frequent disconnection during call

Address:

Bardhaman, West Bengal

I am a prepaid customer of BSNL mobile.I used to call/receive call from my mobile. But during incoming or outgoing call it disconnects frequently every after 2 to 3 minutes.It is so a serious problem that I have to call 3 to 4 times to a person for a full conversation.I reported this problem to the customer care representative of BSNL,they are talking that it is due to low signal in that area,but in my house there is always full signal. Please help me to solve this problem.