iPadOS 9.3.1 (build 13E238) is an official Apple over-the-air update for the iPad mini 2 (Cellular), released on 2016-03-31T16:53:12Z. The update package is 1.13 GB. This is a delta (partial) update that requires 8.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 3b0126be465052235a0a880cf7ba785b56c16087.zip.