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Airtel prepaid sim card stopped working | Complaints and Reviews

Airtel
Airtel Prepaid

I have taken a new Airtel Prepaid Connection (9831200873) on 11th August 2012 from Kolkata. Now today (28.10.2012) i woke up and found "SIM CARD REGISTRATION FAILED" on my mobile. I tried calling from another mobile it says "THIS NO DOSENT EXISTS". I called up customer care thay said " THIS NUMBER ...