T and C : Valid on successful Postpaid Mobile Bill Payments done till 6th May 2016. Only for New Users of FreeCharge. Valid on Min Bill Payment of Rs.400. Max Cash back of Rs.100. POST20 Promocode has to be applied to avail cashback offer. Valid once per New User/Credit/Debit Card/Mobile Number. Valid on credit/debit card and FreeCharge Balance transactions. Cashback will be credited to your FreeCharge Wallet which can be redeemed within 185 days from date of credit and is non transferable. Offer not valid on virtual cards and International Cards which are issued outside India. Not valid for Add Cash, Netbanking & Airtel Postpaid/Prepaid/DTH/Landline. Offer valid on FreeCharge App, Web & mWeb.