Apple has released the fourth iOS 10.2.1 beta for developer testing on iPhone, iPad, and iPod touch. The latest iOS 10.2.1 beta release, identified as 14D27. iOS 10.2.1 is likely a bug fix and performance improvement release. The initial beta was released on December 14 with a second beta. A third beta version was released at the start of this week.
iOS 10.2.1 beta Released on December 12th is the next software update after the current public version iOS 10.2. iOS 10.2 includes Unicode 9.0 emoji characters, three new iPhone 7 and iPhone 7 Plus wallpapers, a new TV app, additional camera features, new Messages screen effects, and more.
Major changes are not expected in iOS 10.2.1, although a new iOS 10.3 Beta is rumored for this week and may include a new Theater Mode toggle accessible in part via Control Center ahead of iOS 11 later this year.
Developers who have not already provisioned their iPhone or iPad to receive over-the-air updates can download iOS 10.2.1 through Apple's Developer Portal.
Apple ID owners who enrolled their device to test Apple betas can download this seed via Apple's Beta Software Program Website.