iPadOS 9.9.11.2.1 (build 15C153) is an official Apple over-the-air update for the iPad mini 2 (Cellular), released on 2017-12-13T18:05:04Z. The update package is 1.49 GB. This is a delta (partial) update that requires 8.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 5a1d0220c0002124b76ca3e462725617f11556dd.zip.