iPadOS 10.3.1 (build 14E304) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2017-04-03T17:00:10Z. The update package is 564.79 MB. This is a delta (partial) update that requires 10.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 35e7bb929120f370d37e121fdf103e1b7cd9d827.zip.