I want to update my iOS to 15
I want to upgrade my iOS to 15
iPhone 7 Plus, iOS 13
I want to upgrade my iOS to 15
iPhone 7 Plus, iOS 13
How can I upgrade iOS 15
How can I upgrade iOS 15
See if this helps: Update your iPhone or iPad - Apple Support
Go to settings - general - software update and see what it says there.
I want to update my iOS to 15