iPadOS 13.3.1 (build 17D5026c) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2019-12-17T18:12:52Z. The update package is 184.55 MB. This is a delta (partial) update that requires 13.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 9724c931adb0cd8abc4a2e03d315bf7e1c30b204.zip.