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Apple ceases iOS 10.1 and 10.1.1 code signing with release of iOS 10.2

Following last week's stable release of iOS 10.2, Apple on Tuesday has stopped signing code for iOS 10.1 and iOS 10.1.1, meaning users can no longer downgrade to the older operating system versions.

Apple routinely stops signing code for older iOS and macOS iterations to protect users from potential bugs or security vulnerabilities patched with the most recent software revisions. In addition, invalidating obsolete code helps ensure a consistent experience across devices.

Released last Monday, iOS 10.2 introduces Apple's new "TV" app, which acts as a smart repository for streaming video content. Sampling TV shows and movies from multiple apps, "TV" lets users watch the shows they love and surfaces new content through a recommendation system.

In addition to "TV," iOS 10.2 also delivers redesigned emoji and more than 100 new characters.

The latest point update also includes a number of performance enhancements for first-party apps. For example, Photos gained improved stabilization and faster frame rates for Live Photos, while Messages nets new "love" and "celebration" full-screen animation effects. HomeKit also receives a buff with notification support for connected accessories.

As for bug fixes, iOS 10.2 addresses issues in Photos, Messages, Music, News, Mail, Accessibility features and more.

Finally, Apple's latest mobile OS update includes a widget for the Videos app, three new wallpapers, a "Preserve Camera" setting and a "Press and Hold to Speak" setting for the home button.

Alongside iOS 10.1 and iOS 10.1.1, Apple stopped signing for tvOS 10.0.1 on Tuesday after tvOS 10.1 landed last week.