iPadOS 9.3.1 (build 13E238) is an official Apple over-the-air update for the iPad 2 (WiFi), released on 2016-03-31T16:50:48Z. The update package is 187.55 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: b552da57ccf847dd1846c086fd58d8aaf09d70f9.zip.