iPhone 5s
iPhone 5s how to software update and iOS 12.5.6 viruses 10.3.3
iPhone 5s, iOS 10
Question marked as
Best reply
Here is how to: Update your iPhone or iPad - Apple Support
Given you’re on an iPhone 5s on iOS 10, you’re probably running somewhat low on internal storage, which means using a computer. That’s described in the above-linked article.
iOS 16 is current, and requires an iPhone 8 or newer.