My iPhone 6 with iOS 12.5.5 is not updating iOS 15.5 how it can be done

savita151 wrote:

My iPhone 6 with iOS 12.5.5 is not updating iOS 15.5 how it can be done

By replacing the iPhone 6 with a newer (used, refurb) or new iPhone.

iPhone 6 has half the memory of the oldest supported iPhone, the iPhone 6s, among other differences.

There are no hardware upgrades.

Older iPhone models with iOS 15 support, including the iPhone 6s, are themselves limited with what newer iOS features are available, too.

The iPhone 6, released by Apple more than seven years ago, is too old to be updated beyond iOS 12.5.5.