How to update my iPhone 6 to iOS 15?

The iPhone 6 – a phone that Apple introduced ten years ago, can't run iOS 13 or later. iOS 12 is the end of the line.

Among other things, the iPhone 6 only has 1 GB of RAM. All iPhones that can run anything higher than iOS 12 have at least 2 GB.

Your iPhone 6 cannot update past iOS 12.5.7, and is no longer supported in iOS software updates.

-Zachyy ✌️

If you want to run iOS 15, you will need an iPhone 7.

If you want to run iOS 16, you will need an iPhone 8 or iPhone X.

If you want to run iOS 17 and iOS 18, you will need an iPhone XR or higher model.