https://www.freecharge.in/ Use Code: BL50 http://offers.freecharge.com/BL50/ T&C: Valid on successful Bill payments done till 17th Feb 2016 Valid only for New users only on the FreeCharge App Valid on minimum payment of Rs.500. Flat cashback of Rs.50 BL50 promocode has to be applied to avail cashback offer Valid once per user/credit/debit card/mobile number Valid on Credit Card/Debit Card transactions 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 & Netbanking Offer not valid for Airtel transactions Virtual Cards & Cards issued outside India will not be eligible for cashback / reward