Upgrade my iOS version

oluwa214 Said:

"Upgrade my iOS version: I want to upgrade my iPhone6 iOS to 15.7.5"

-------

Updating an iPhone 6 Past iOS 12:

A. You can't.  The iPhone 6 will only install to iOS12. See here: Update your iPhone or iPad Software if you're Experiencing Issues with Location, Date, and Time - Apple Support. And, for the note, even if you could update, only the latest compatible version will install.

So, what to Try:

B. Update Using a Computer:

Have a Computer Handy? If so, try using a computer to update. Go here: Update your iPhone Using a Computer - User Tip. If any updates are availabe, they will install, sure enough.

An iPhone 6 isn't capable of 13 or above; they require at least 2GB of RAM.

(235153)