How do I update my iPhone 7 Plus to latest iOS version?
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[Re-Titled by Moderator]
iPhone 7 Plus, iOS 14
The "latest" iOS version is 17.6.1......but the iPhone 7 Plus is not capable of running anything higher than iOS 15.8.3, so that would really be the "latest" version for the iPhone 7 Plus.
Tap Settings > General > Software Update to see if updates are available for the iPhone 7 Plus.