iPadOS 11.3.1 (build 15E302) is an official Apple over-the-air update for the iPad 5 (WiFi), released on 2018-04-24T17:07:59Z. The update package is 745.92 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: cae6b206944a2fb6e14c29f83e6df0a05376e90d.zip.