iPadOS 9.9.11.1.1 (build 15B150) is an official Apple over-the-air update for the iPad Air (Cellular), released on 2017-11-09T18:03:47Z. The update package is 1.43 GB. This is a delta (partial) update that requires 8.4.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 26b62bf2402f51f291aacae37d2f84162669173c.zip.