Freecharge Rs.50 cb on Rs.50 twice per user (account specific)
https://www.freecharge.in/
Code: 50APP

T&C:

Valid on successful Recharges/Bill Payments done till 31st March 2016
Valid on Minimum Recharge of Rs.50. Max cashback of Rs.50 per transaction
Offer is valid only on the FreeCharge App
50APP Promocode has to be applied to avail cashback offer
Valid twice per User/Credit/Debit Card/Mobile Number
Cashback will be credited to your FreeCharge Wallet which can be redeemed within 185 days from date of credit, and is non transferable
Valid on transactions done via Credit/Debit card/Netbanking & FreeCharge Balance
Offer not valid for Airtel transactions
Virtual Cards & Cards issued outside India will not be eligible for cashback / reward