How do I update my iPhone iOS?

Efiaconfess32 wrote:

What about IPhone 7 iOS 15.79

What about the iPhone 7?

The OP's tag line indicates that the iPhone has an iPhone 5s.

• For an iPhone 5s, the latest release of iOS 12 is the end of the line.
• For an iPhone 7, the latest release of iOS 15 is the end of the line.

Currently, the latest releases are, respectively, 12.5.7 and 15.7.9.

About iOS 12 Updates - Apple Support

About iOS 15 Updates - Apple Support

While you seem to have already solved your tech support issue, you should note that the iPhone 5S can be updated to iOS 12.5.7, no further.

If your phone indicates that your software is up to date, this is telling you that you have no more updates available for your phone.

What about IPhone 7 iOS 15.79