I can't install iOS on iPhone 6 Plus

Apple_helper_guy wrote:

I think the iPhone 6 is out of support for iOS 16.

iPhone 6 is out of support for iOS 13 and newer, and forever limited to iOS 12.

So, yes, iPhone 6 is also unsupported by iOS 16.

iPhone 6s is out of support for iOS 16 and newer, and forever limited to iOS 15.

Look here…

If your iPhone or iPad won't update - Apple Support

arjay0826 wrote:

i can't instoll ios

An iPhone 6 cannot be updated past iOS 12.

Currently, the most recent patch for iPhone 6 is iOS 12.5.6.

I think the iPhone 6 is out of support for iOS 16.