Power button on top was the old configuration for iPhones, too, for the first 7 generations. It went to the side from iPhone 6 onwards, as the phone got larger.

Power button on top was the old configuration for iPhones, too, for the first 7 generations. It went to the side from iPhone 6 onwards, as the phone got larger. "the top button was renamed to "side button" and moved to the side of the phone instead of the top to improve its accessibility." https://en.wikipedia.org/wiki/IPhone_6 https://en.wikipedia.org/wiki/IPhone_6