Airtel's Rs 99 GPRS plan for prepaid users offers 100 MB usage in daytime and 2 GB free usage at night (12 am to 8 am) That free 2 GB from 12 to 8 am sounds nice except that it's not. Some random amount keeps getting charged -- 1. the amount is not proportionate to your usage. 2. sometimes they charge, sometimes they don't. Their customer care is nothing more than IVR. And IVR does not list an option to report this issue. Press 9 to talk to an executive and they'll ask you to sms airtel to 121. The sms of... read full review »