Following with releases of iOS 10.2.1 Beta 1 for developers for iPhone, iPad and iPod touch a days ago, Apple seeded iOS 10.2.1 Public Beta 1 to public testers with minor changes, bugs fixes and other improvements. 
iOS 10.2 introduces new features including the TV app (US Only), a new and unified experience for accessing your TV shows and movies across multiple video apps. Emoji have been beautifully redesigned to reveal even more detail and over 100 new emoji have been added including new faces, food, animals, sports, and professions. This update also includes stability improvements and bug fixes.

Following with releases of iOS 10.2.1 Beta 1 for developers for iPhone, iPad and iPod touch a days ago, Apple seeded iOS 10.2.1 Public Beta 1 to public testers
iOS 10.2.1 Public Beta is available for
download to registered developer’s via OTA over-the-air on iPhone 7- 7 Plus and
other compatible devices like iPhone 6s-Plus, iPhone 6 – Plus-, iPhone
5-5C-5S-SE from iOS settings app running previous beta or you can download iOS
10.2.1 Public Beta through Apple’s online developer center and Apple Beta
Software Program
.
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