https://www.helpchat.in/sharedeals/...ck-on-rs500-and-above-using-creditdebit-card/ T&C: - Flat Rs.50 cashback on Rs.300 and above. - Use code CARDSECASH to avail the offer. - Can be used only once per User/Device/Number. - Offer is valid for transactions through credit card only. - Valid for Users doing recharge for the first time. - Cashback will be credited immediately. - Not valid for Airtel users. Valid Till: Dec. 31, 2016, 11:59 p.m.