iPadOS 9.3.5 (build 13G36) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2016-08-25T16:53:24Z. The update package is 294.45 MB. This is a delta (partial) update that requires 9.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 96a24ff484620b794bf2d6c660a82a4352a02a85.zip.