iPadOS 11.4 (build 15F5077a) is an official Apple over-the-air update for the iPad mini 4 (WiFi), released on 2018-05-14T17:16:56Z. The update package is 247.67 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: b47222fed639ac2bc3016a0c9402e3b5ec2da06d.zip.