How to update iPhone 6s to latest version of iOS?

popoola196 wrote:

How can I update 14 iOS to 15 iOS on 6s plus

To update an iPhone 6s Plus to the latest release of iOS 15 – currently iOS 15.8.2 – see

Update your iPhone or iPad - Apple Support

Updating iOS: common issues and solutions - Apple Community

About iOS 15 Updates - Apple Support

Note that the iPhone 6 Plus (no 's') is a different, earlier phone that cannot run iOS 13 or higher.

Go to settings - general - software update and start there. That phone cannot update past iOS 15.

How can I update 14 iOS to 15 iOS on 6s plus

Follow my instructions.