iPadOS 9.9.11.4 (build 15F79) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2018-05-29T17:14:27Z. The update package is 1.39 GB. 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: 74529c6ee5dc07824a36fed254fb1f0a3b840593.zip.