iOS 8.2 beta 3 is compatible with iPhone 4S, iPhone 5, iPhone 5c, iPhone 5s, iPhone 6, iPhone 6 Plus, iPad Air 2, iPad mini 3, iPad 2, iPad (third-generation), iPad (fourth-generation), iPad Air, iPad Air 2, iPad mini, iPad mini 2, iPad mini 3 and iPod touch (fifth-generation).
iOS 8.2 adds support for WatchKit, the developer SDK for the Apple Watch. Developers can make Glances, Notifications and WatchKit apps with the new SDK.
The beta release is available as an Over-the-air (OTA) update on devices running iOS 8.2 beta 2, and is available on the Dev Center as well. Here are the direct download links to the firmware (Note that you need to be a registered iOS developer to download these files):
- iPad Air 2 (Model A1566)
- iPad Air 2 (Model A1567)
- iPad mini 3 (Model A1599)
- iPad mini 3 (Model A1600)
- iPad mini 3 (Model A1601)
- iPad Air (Model A1474)
- iPad Air (Model A1475)
- iPad Air (Model A1476)
- iPad mini 2 (Model A1489)
- iPad mini 2 (Model A1490)
- iPad mini 2 (Model A1491)
- iPad (4th generation Model A1458)
- iPad (4th generation Model A1459)
- iPad (4th generation Model A1460)
- iPad mini (Model A1432)
- iPad mini (Model A1454)
- iPad mini (Model A1455)
- iPad Wi-Fi (3rd generation)
- iPad Wi-Fi + Cellular (model for ATT)
- iPad Wi-Fi + Cellular (model for Verizon)
- iPad 2 Wi-Fi (Rev A)
- iPad 2 Wi-Fi
- iPad 2 Wi-Fi + 3G (GSM)
- iPad 2 Wi-Fi + 3G (CDMA)