iPadOS 9.9.11.2.1 (build 15C6153) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2017-12-13T18:03:11Z. The update package is 1.71 GB. This is a full OTA update that can be applied from any compatible base version. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 427919b8b7432380d7db21fcbaf8892d8a420ad6.zip.