Similar to the recent iOS 10 Beta 5, iOS 10 Public Beta 4 includes:
- The iPhone 6 and 6s should now work properly with Apple's Smart Battery Case
- Apple plans to reprocess facial recognition data in beta 5, so all named, favorited, and merged face data will be reset
- There's a new sound (like a door closing) when locking the iPhone
- The output icon seen in the Control Center, the Music app, and other locations in iOS has been slightly tweaked
- The "Home" section in the Settings app has been removed from the iPhone, but remains available on the iPad
- The new widgets panel (accessible by swiping to the right) now displays the date on all devices