iPadOS 11.3.1 (build 15E302) is an official Apple over-the-air update for the iPad mini 2 (WiFi), released on 2018-04-24T17:05:53Z. The update package is 703.93 MB. This is a delta (partial) update that requires 11.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: fa761f4baa17faf12776118271b7774b0c49e4ac.zip.