iPadOS 11.4 (build 15F5077a) is an official Apple over-the-air update for the iPad mini 2 (WiFi), released on 2018-05-14T17:16:44Z. The update package is 222.81 MB. This is a delta (partial) update that requires 11.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 01b31f3e86d4b4d5e0cc620cca05aff72af9853a.zip.