Apple Hub on Twitter: "These are the devices expected to support iOS 15. Apple is expected to drop support for the iPhone 6s, iPhone 6s Plus, and iPhone SE (1st Gen). Apple
Here's How Long Apple Has Supported Old iPhones / Digital Information World
iOS Support Matrix | dorianroy.com/blog
Apple's iOS 14 will Support iPhone's starting with iPhone 6s unlike Android Phone users that quickly get lost in an update Black Hole - Patently Apple
Which iPhones will support iOS 16 and how to update your iOS- Technology News, Firstpost
New Features in iOS 6 Receive Spotty Support from Older Devices - MacRumors