How to update my iPhone 7 Plus to latest version?

Hello,

There are different ways to ensure the highest iOS that your device will support is installed on your device. When updating, your device will update to the highest version currently available that it will support, or it will just say it is up to date (and can't go any higher) and won't install anything. If you want to run a higher system version than your current device is capable of running, you need to buy a newer device.

Any equipment currently running iOS 12.5.7 can't be updated to anything higher.

An iPhone 5S, 6, or 6plus, will only update to iOS 12.5.7

iPhones 6S through 7, and SE(gen. 1), will only update to iOS 15.8.2

An iPhone 8 to X (just a plain X) will update to 16.7.6

iPhones XS, SE (gen 2 or later), and higher will update to iOS 17.4

This support article has instructions about updating an iPhone or iPad wirelessly --> Update your iPhone or iPad - Apple Support Read the article for recommended criteria for being able to use wireless updating.

You can also use Mac and PC computers to update system software --> Update iOS on iPhone - Apple Support

If you want a video about doing this, follow this link —> https://www.youtube.com/watch/1FcE86kwODQ

this is how Update your iPhone or iPad - Apple Support

though the hardware of iphone7 does not support higher than

Current: iOS 15.8.2, released March 5, 2024[4]

iPhone 7 - Wikipedia