I have taken a new Airtel Prepaid Connection (99941581XX) around 7 years before from TamilNadu. From (04/May/2014) night(around 8:00pm) onwards unable to call just showing emergency mode. While trying to connect via network manual search its showing “SIM CARD REGISTRATION FAILED” on my mobile. I fail to understand what is my fault. Pls look into the matter and resolve ASAP. It’s affecting my business a lot.

Thanks,
Parani