iPadOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPad 6 (Cellular), released on 2018-05-29T17:15:36Z. The update package is 286.34 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: 19f625f2c10fd0f907a2099975df95fe2d87bd60.zip.