iPadOS 9.9.11.2.1 (build 15C153) is an official Apple over-the-air update for the iPad mini 2 (China), released on 2017-12-13T18:05:44Z. The update package is 1.21 GB. This is a delta (partial) update that requires 9.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: afac209a74cd9b7e476556aba65d120a802bd65d.zip.