How to update my iPhone 7 plus’ ios

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.

iPhones 6S through 7, and SE(gen. 1), will only update to iOS 15.8.3

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

Use a computer or the Software Update function in Settings. If you encounter an issue other than the one listed below, describe it in this thread.

Apple no longer signs 15.5. You'll need to update directly to 15.8.3.

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