iPadOS 9.3 (build 13E233) is an official Apple over-the-air update for the iPad 2 (WiFi), released on 2016-03-21T18:55:27Z. The update package is 217.72 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: 4419394569af12ad16abb951b7e0b68fee20589d.zip.