How to update from iOS 12 to iOS 15.7.3?
How to update 12 into 15
[Re-Titled by Moderator]
iPhone 6, iOS 12
Unfortunately, the iPhone 6 is not compatible with iOS 13 or higher.
That model can be updated to iOS 12.5.7, no further.
2 replies
An iPhone 6 isn't capable of 13 or above; they require at least 2GB of RAM.
(236047)
How to update from iOS 12 to iOS 15.7.3?