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 270.54 MB. This is a delta (partial) update that requires 9.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 296bc299af6f1b41faa4f669bfab9c1bfac9a7f4.zip.