When Android Pay was released, you had to select a default card to use for payment, and using any card other than the default was a little bit difficult; you had to open the app, change another card into the default slot, and then you could use that card for payment. However, it didn’t revert; you had to make sure whichever card you wanted to use was in the default slot, otherwise you’d need to open the app first.
Google has kind of heard the wants of its users, releasing an update to Android Pay to allow users to pay with any card in their wallet, instead of just the default. However, this is a little bit misleading; you could do this before, but it’s now been made just a little bit easier. Instead of having to assign a new default card, you can temporarily pay with an alternative card by simply opening Android Pay and dragging that card to the top. The next payment, then, will come from that card.
On my Android Pay, I only have the one card set up, so I’m not able to fully test this, and besides the brief update notes in the Play Store listing, this doesn’t seem to have been picked up elsewhere. We would assume that after making a payment with a non-default card that Android Pay will revert to your default for the next payment after that … but it’d be good to confirm this.
Have you got a couple of cards in your Android Pay? Let us know how the new feature works for you.