That second part is news to me, thanks for the correction. I have a friend that bought an iPhone with this deal and said they couldn’t see the remaining balance to be paid after paying off the entire balance of the card. As in, it would show how much is owed on the iPhone plan, but wouldn’t allow them to make an additional payment (they made it sound as if it was all or nothing — pay off full iPhone balance or just your monthly payment). Either they weren’t reading it right or this has been changed/updated (for the better!).
This makes the deal that much better for those in the market for a new Watch!
Happy to clarify! To be fair, my installments are for a Mac (and technically AirPods the way they do the BTS promo, but paid those of early). Maybe it's different for iPhone?
You also have to know where to look, and the way the UI is set up it's easy to overlook. You have to open the card in Wallet, tap the ... in the top right corner, tap the installments section, tap the device, then tap Pay Early. My MBP will let me pay additional amounts in $25 increments. Seems simple, but it's kind of like when you open settings on an iPhone and know exactly what you're looking for but lose it in the list of stuff in there 😂