iPadOS 9.9.11.0.2 (build 15A421) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2017-10-03T17:02:11Z. The update package is 1.5 GB. This is a delta (partial) update that requires 8.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b47cfe1f5f729bc5158ff61b67eac8ebebe912cf.zip.