visit www.freecharge.in Login with the same E-mail id on which you had got the mail Enter mobile number Enter the amount of Rs 50 or more & Apply coupon code NOW50 Now proceed payment Valid on successful Recharges/Bill Payments done till 15th Jan 2016 Valid on Min Recharge of Rs.50. Max Cash back of Rs.50 NOW50 promocode has to be applied to avail cashback offer & is linked to your gmail. Valid only Once per User/Credit/Debit Card/Mobile Number Valid on credit/debit card /netbanking transactions only Cashback will be credited to your FreeCharge Wallet which can be redeemed within 185 days from date of credit, and is non transferable Not Valid for transactions done via FreeCharge Balance Offer not valid for Airtel transactions