iPadOS 9.3.1 (build 13E238) is an official Apple over-the-air update for the iPad mini 3 (WiFi), released on 2016-03-31T16:53:38Z. The update package is 270.6 MB. This is a delta (partial) update that requires 9.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d2976b63d0b55c60519e488d744c16fc8fb2dfd9.zip.