How to download iOS 15.1 or 26

You cannot download iOS 26 to the iPhone 7 shown in your tag line.. Nor can you download iOS 16, 17, or 18. The iPhone 7 cannot update past iOS 15.

To download the latest release of iOS 15 – iOS 15.8.6 - see the Apple Support article.

About iOS 15 Updates - Apple Support

Update your iPhone or iPad - Apple Support

iOS 26 is not compatible with your iPhone 7.

If a software update is available for your iPhone 7......it will appear when you.....

Tap Settings > General > Software Update

What message appears when you do this?