iPadOS 8.1.3 (build 12B466) is an official Apple over-the-air update for the iPad Air (WiFi), released on 2015-01-27T17:55:04Z. The update package is 1.09 GB. This is a delta (partial) update that requires 7.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: affe47ffff109a59b451e570579c1a53af371a07.zip.