1. Download or update Airtel Thanks app from Play store. Or visit https://www.airtel.in
2. If you're login from Airtel App, then you may have to create an account there.
3. If your Amazon.in account is not verified with Mobile number, you should do it first, otherwise you do not get cashback.
3. Proceed to recharge for any Airtel mobile number. Choose Mobile Recharge => enter any airtel number that you want to recharge, recharge amount (should be ₹35 or more) => on the next page, you find several payment options. Under wallet option, link Amazon pay.
4. If you previously linked Airtel payment with Amazon Pay and did any recharge in past, then you do not get any cashback.
5. Click on Amazon pay option. It redirects to Amazon. Sign in to Amazon and pay with Amazon Pay. After successful recharge, cashback (of Rs. 5 - 200) is added to Amazon Pay balance within 24 hours. Cashback is varying between ₹5 - ₹200.
6. NB: You should already have sufficient money to Amazon pay for payment.