How to update my iPhone to iOS 15?

Update your iPhone, iPad, or iPod touch

• If you have an iPhone 5S or 6/6plus, the highest you can update to is 12.5.7

• If you have an iPhone 6S through 7, or SE 1st generation, you can update to 15.7.6

• If you have an iPhone 8 or higher, or SE 2nd or 3rd generation,you can update to 16.5

Go to Settings > General > Software Update.

This link will show you how to update your iPhone, iPad, or iPod touch using WiFi -

Update your iPhone or iPad - Apple Support

This link will show you how to update using your computer -

Update iOS on iPhone - Apple Support

This link lists the iPhone versions that will support iOS 17:

iPhone models compatible with iOS 17 - Apple Support

Do you have one of these models?

To install iOS 15, you would need an iPhone 6s, iPhone 6s Plus or iPhone 7.

Do you have one of these models?

im trying to install iOS 17. 5 1 and 15