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 1.29 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: 2fc97f48c64f45d3f7d6990a2e3bda5bed5fcf85.zip.