How can I update my iPhone 7 Plus to iOS 16?

"How can I update my iPhone 7 Plus to iOS 16?"

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Updating and iPhone 7 Plus to iOS16:

You can't. Your device is incompatible with iOS16. See here: iOS 16 and iPadOS 16 are Compatible with these Devices - Apple Support

Screenshot:

Probably you are seeking to update becuase --> New Apps that require higher iOS versions than your device can be updated to... - Apple Community