iPadOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPad mini 3 (Cellular), released on 2018-05-29T17:13:53Z. The update package is 616.1 MB. This is a delta (partial) update that requires 11.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 241eca0f9eecbd42328cbb794f52b5bae74af4b8.zip.