iPadOS 9.9.11.2.1 (build 15C6153) is an official Apple over-the-air update for the iPad 5 (Cellular), released on 2017-12-13T18:03:11Z. The update package is 1.7 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: 7a15d6ab125ac3ebb186ba6c0ce5e77da1e4b70d.zip.