iPadOS 9.9.11.1 (build 15B93) is an official Apple over-the-air update for the iPad Air (Cellular), released on 2017-10-23T17:01:20Z. The update package is 1.29 GB. This is a delta (partial) update that requires 9.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d8f5ef7cf8d7505b3ba23e29094f52be04cf6714.zip.