Why does Tap to Pay say "The card reader cannot be used while a phone call is active"?

Short answer: Tap to Pay can't take a payment while your phone is on a call. End the call, then start the payment again.

With Tap to Pay, your phone itself is the card reader. While a call is active, the phone won't start the payment, and the app shows this message instead.

What should I do?

1. Hang up or finish the call.
2. Go back to the app and start the payment again.
3. Have your customer tap their card or phone as usual.

On the phone a lot while you sell?

This message only comes up with Tap to Pay. With a Stripe card reader, the reader takes the card instead of your phone. See which card readers work with the app.