IOS 16.4 build 20E246

iOS 16.4 build 20E246 is the official Release Candidate build of iOS 16.4, which was released to Apple developers and public beta testers on 21 March 2023.

New features and changes

 * The ability to merge duplicate photos from a shared library, which was first discovered in iOS 16.4 Beta 3, has been added.
 * Voice Isolation for phone calls has been re-added.