How to update my iPhone 6 Plus?
How to appdate my phone
[Re-Titled by Moderator]
iPhone 6 Plus, iOS 12
Question marked as
iPhone 6 Plus is supported on iOS 12, and no later.
iOS 12.5.7 is the current version for iPhone 6 Plus.
For newer iOS, your options are a newer (used, refurb) or new iPhone.