iPadOS 8.1.3 (build 12B466) is an official Apple over-the-air update for the iPad Air (Cellular), released on 2015-01-27T17:55:04Z. The update package is 1.49 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: 549e396dd8374f861b7fff6eac470ebda502ab93.zip.