How to update my iPhone 7 Plus to iOS 15.7.8?
i Phone update
[Re-Titled by Moderator]
iPhone 7 Plus, iOS 13
i Phone update
[Re-Titled by Moderator]
iPhone 7 Plus, iOS 13
The articles from Apple on How to update an iPhone has the needed information
refer below
Update your iPhone or iPad - Apple Support (CA)
If your iPhone or iPad won't update - Apple Support (CA)
How to update my iPhone 7 Plus to iOS 15.7.8?