How to install 15,.7 iOS?
How to install iOS 15.7? No download link.please help me
Here's how to update your iPhone Update your iPhone or iPad - Apple Support wirelessly
and if the wireless option is not working or if you can't see the option to update.
Use this guide if you have a mac Update your iPhone, iPad, or iPod touch with the Finder - Apple Support
or this guide if you are using Windows Update your iPhone, iPad, or iPod touch with iTunes - Apple Support
Hope this helps you