Airtel Thanks App UPI Offer - Upto Rs 250 Cash back on UPI Transactions through Airtel Payments Bank UPI handle. Cashback of Rs 2 on each transaction of Rs. 2000 to Rs 4999. Cashback of Rs 5 on each transaction of Rs. 5000 and above. Maximum cashback that can be availed during the campaign validity is Rs. 250. Just download the Airtel Thanks and start making UPI transaction to get cashback. No coupon code needed. Offer valid for all users of Airtel. Grab the deal now!.