iPadOS 11.2.2 (build 15C202) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2018-01-08T18:13:34Z. The update package is 359.18 MB. This is a delta (partial) update that requires 11.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 46c5130deb54868d6837fcdf73b0b1162f286430.zip.