iPadOS 9.3.1 (build 13E238) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2016-03-31T16:54:06Z. The update package is 447.53 MB. This is a delta (partial) update that requires 9.0.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 41d2fc52d46a674a0ccada015fe782b72b4ae222.zip.