iPadOS 11.4 (build 15F5071a) is an official Apple over-the-air update for the iPad 6 (Cellular), released on 2018-05-07T17:11:26Z. The update package is 230.99 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: 7ea6617fe968b1c9f6ae46ec7e03c11e22c763b8.zip.