iPadOS 10.3.1 (build 14E304) is an official Apple over-the-air update for the iPad mini 2 (Cellular), released on 2017-04-03T16:59:56Z. The update package is 534.68 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: 5c06b4285b63e636b38e3174172e1bd700cd82a9.zip.