iPadOS 8.2 (build 12D5461b) is an official Apple over-the-air update for the iPad Air (Cellular), released on 2015-01-12T17:54:04Z. The update package is 290.12 MB. This is a delta (partial) update that requires 8.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: cef64fde24f89faca6347dafc45ccafe7fb3fee2.zip.