iPadOS 11.3 (build 15E216) is an official Apple over-the-air update for the iPad mini 2 (WiFi), released on 2018-03-29T17:06:12Z. The update package is 578 MB. This is a delta (partial) update that requires 11.2.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 53b279d971e37dc65e435c52bead5b852b9be8fd.zip.