iPadOS 9.3 (build 13E5233a) is an official Apple over-the-air update for the iPad 2 (Mid 2012), released on 2016-03-14T21:44:59Z. The update package is 24.01 MB. This is a delta (partial) update that requires 9.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a0f9afa7cb6f1b6f71dfe180edfe49db8c0437e2.zip.