iPadOS 8.1.3 (build 12B466) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2015-01-27T17:55:05Z. The update package is 1.45 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: 5e7595787862c7483e49caf8dac37b9aea0f6557.zip.