l will like to update my iPhone6s plus to iOS 15.7.9

Settings>General>Software update.

you need to be connected to WiFi and have at least 50% battery charge.

This is not possible. If your iPhone is qualified, it will update to iOS 15.8 or higher.

What model of iPhone do you have? Settings > General > About > Model Name

I won’t to my iPhone to update to iOS 15.6.7

I want to see it on my iPhone

I need to update my ios 14.3

How update ios 14 to 12.5.7

I will update my I phone