iPadOS 9.9.11.2.1 (build 15C153) is an official Apple over-the-air update for the iPad mini 4 (WiFi), released on 2017-12-13T18:07:19Z. The update package is 1.25 GB. This is a delta (partial) update that requires 9.3.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 8f7eab0905b12bc22021dde731ecfe004c97bd49.zip.