I have taken airtel prepaid connection on 26 jun 2010. After four days I was unable to make outgoing calls. Only incoming calls I was able to recieve. After seven days my mobile is displaying invalid sim. No outgoing and incoming is possible from my handset. MY MOBILE NUMBER IS – 9596663191. My alternate number is – 8803702115. I belongs to Udhampur district of j&k. I have taken connection from Bhardwaj pansari communication and his number is 9622003226. It will be great help for me if you do something about this inconvenience.