Apple hasn't even announced the iPhone 17, but there are already rumors about an iPhone 19 that won't be revealed until 2027. There's a chance that Apple could use the twentieth anniversary as a reason to release another significant redesign similar to iPhone X.
When Apple announced iPhone X, pronounced "iPhone 10," it skipped the iPhone 9 completely. There was never any real explanation, but it seemed fitting that the iPhone X was released on the tenth anniversary in 2017.
A rumor suggests that the twentieth-anniversary iPhone could be dubbed iPhone 20 — thus skipping iPhone 19. There's no way to know if Apple will refer to it using Roman numerals again, but iPhone XX seems a bit odd written out.
The redesigned iPhone would use more glass elements, but that's already a rumor for the iPhone 17. So, it seems Apple could finally land on an all-glass iPhone that has been rumored before.
The glass UI rumored for iOS 19 could continue to be refined until 2027 where an all-glass iPhone reacts to the world around it. There's no telling what Apple might have planned, software wise.
The rumor also suggests 2027 could finally be the year Apple releases an iPhone Fold. That lines up with previous predictions, but such a device has been predicted and subsequently pushed back since at least 2019.
Apple will announce an iPhone in 2027, that much is certain. Expect more as leaks and rumors solidify around the product in coming years.
Malcolm Owen
William Gallagher