Airtel Prepaid
Sim card problem

Sir,

My name is T.Sriram. I am in Raigarh, Chattisgarh state. My prepaid airtel is 9981158145 with life time validity. There was charge of Rs.40/-.For the past one week i am getting 'insert the sim' display in the handset. Pl check whether the sim is deactivated due to some reason and activate the same.

Sriram