Why can’t I get iso 17
It says iso update so I want to get the latest version I have iso 15 but want iso17 and it won’t update
Which model iPhone?
iPhone 6S and iPhone 7 are supported on iOS 15, but not on later iOS versions.
For an iPhone that can run iOS 17:
… Here is how to: Update your iPhone or iPad - Apple Support
… and what to do: If your iPhone or iPad won't update - Apple Support