iPadOS 9.9.13.1 (build 17A5831c) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2019-09-04T17:05:37Z. The update package is 2.57 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: a26f9f88dced5a8bb0f0e2ac095972ceab46d5d3.zip.