”Indian card declined” issue solved.
There is some issue with Indian debit or credit card when we try to add the cards in the payment method.
I faced the similar problem while using Airbnb app for IOS/ Android and the website while using a laptop. I tried to change the currency to dollars and made a PayPal account. Unfortunately, the problem was not resolved probably because we need some sort of authorization from the bank.
In order to complete the payment using Airbnb on ”mobile phone browser”. Delete the app on the phone (as when you will open the website on phone browser it will redirect you to the app), and open the complete booking option from the airbnb inbox (do not add card). The page will redirect you to payU money portal from where you can complete the payment.
Claire also mentioned in the comment.
The hack is not to add the card.