How to update my iPhone 7 to iOS 16?

Sorry, an iPhone 7 can't run anything higher than iOS 15.8.1.

If you want to install Netflix, you will need to purchase a newer phone. You might try using the web version of Netflix

Akasharvinsami wrote:

I wanted to use Netflix but it say I need iOS 16 plus to use it

If you need iOS 16, then you clearly need a newer, more modern iPhone. iPhone 7 is NOT capable of running iOS 16 or anything higher.

If you want to run iOS 16, you need an iPhone 8 or higher model.

If you want to run iOS 17, you need an iPhone XR, XS or higher model.