Iam holding Airtel prepaid sim card. Applied for prepaid to postpaid conversion a month ago. Submitted the proofs and verfication is also done. They charged Rs.100/- for the conversion. But till now it is not activated. They have given new sim card and when i install it in phone, it is showing as 'unregistered sim'. Pissed off calling hundred time daily to the Airtel representatives. read full review »