I can’t update to iOS 15? I’m on iPhone 6 but it’s not my regular phone

The iPhone 6 cannot run iOS 13 or higher, it is too old.

The iPhone 6 cannot be updated beyond iOS version 12.5.x. That is the highest that the iPhone 6 can go. This is because the iPhone 6 does not have updated hardware to support higher versions of iOS.

Axel F.

The iPhone 6 can’t update past iOS 12.5.1. You need a new phone.

IPhone 6 is not supported for IOS 15, doesn’t have enough battery/ram power.

More info: https://support.apple.com/ios/update