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Making a payment on the S3
This is the screen the user sees on opening the Visa payWave app. It shows the balance on the account and the previous transaction. To make payments of more than £20, you touch the large yellow bar marked 'Authorise a payment' and enter a passcode. This can be done while waiting to be served so that it's ready for the payment terminal.
But the user doesn't have to open the app to make a lower-value payment. It opens automatically when the phone is held over the point-of-sale reader.