iPadOS 8.1.2 (build 12B440) is an official Apple over-the-air update for the iPad 4 (Global), released on 2014-12-09T17:49:03Z. The update package is 1.69 GB. This is a delta (partial) update that requires null already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f07b02b9892eee6a0b498050184c411145f5930b.zip.