iPadOS 11.4.1 (build 15G5054c) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2018-05-30T17:04:47Z. The update package is 211.65 MB. This is a delta (partial) update that requires 11.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4739b55ce52774896af120f66271379a5f0a323e.zip.