iPadOS 9.3.1 (build 13E238) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2016-03-31T16:54:05Z. The update package is 447.61 MB. This is a delta (partial) update that requires 9.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 72ac1b0e75f846c649f9aff97721a41c6dca3484.zip.