iPadOS 9.3.1 (build 13E238) is an official Apple over-the-air update for the iPad mini 2 (Cellular), released on 2016-03-31T16:53:17Z. The update package is 319.23 MB. This is a delta (partial) update that requires 9.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b64bf3ef902d223a1d0f14d21e773866ecbd4e2c.zip.