How to update my iPhone 6 to iOS 15
I will like to update to iOS 15
[Re-Titled by Moderator]
iPhone 6s, iOS 14
Question marked as
You cannot update an iPhone 6 to iOS 15. For the iPhone 6, the latest release of iOS 12 is the end of the line.
If you meant to ask about an iPhone 6s (the phone mentioned in your tagline), see:
Update your iPhone or iPad - Apple Support
For the iPhone 6s, the latest release of iOS 15 is the end of the line.