[Resolved]  Airtel Prepaid — no coverage in assam area

I am using Airtel mobile bearing # [protected] since 2 yrs at chennai Tamilnadu. I use to get coverage when i move out of TN every time. but to my dismay, now when i visited Assam
Guwahati there is no coverrage thkough i was getting calls till NJP ( new jalpai guri) after crossing NJP the coverage got cut i was put very critical position by not getting the coverage. I was not able to neither contact nkor receive any calls though i am having prepaid connection with roaming facility. I couldnot find any Airtel shop to get the problem settled though i find Airtel hoardings in many places. pl verify and reply to me at earliest.