iPadOS 8.3 (build 12F5047f) is an official Apple over-the-air update for the iPad Air (Cellular), released on 2015-03-12T16:56:08Z. The update package is 81.4 MB. 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: bd1f8f7eeee3fac2686992f185a440ff3da74d4f.zip.