iPadOS 8.3 (build 12F5069) is an official Apple over-the-air update for the iPad Air (Cellular), released on 2015-04-08T17:56:02Z. The update package is 1.48 GB. This is a delta (partial) update that requires 8.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f06366f6a2e18b33be169c7190efd7739e996ffa.zip.