Apple has seeded the 3rd beta for iOS 9.3 to
registered developers for testing. The previous betas of iOS
9.3
 consisted features like Night Shift,
Education app, Notes app enhancement etc. We will let you know the features and bug that are existed in this new beta in our
next article. The update is available Over the Air where developer can install
this beta by going to Settings–General—Software Update.
This beta can be installed only by the registered developer as said by the Apple. But if you are not a developer but like to install the beta version of the iOS 9.3 without UDID or developer account, follow these steps to get iOS 9.3 beta 3 on your device.


Here are the devices iOS 9.3 beta 3 is compatible with:
  • iPhone 6s, iPhone 6s Plus, iPhone 6, iPhone 6 Plus, iPhone 5s, iPhone
    5c, iPhone 5,     iPhone 4S
  • iPad Air 2, iPad Air, iPad 4, iPad mini, iPad 3, iPad 2
  • iPad mini 3, Retina iPad mini (iPad mini 2), iPad mini
  • 6th & 5th generation iPod touch
If you want to enable Night Shift mode on your
Jailbroken device then here is the link that will guide through all the process. How to enable iOS 9.3’s Night Shift mode
on older iOS version