iPadOS 11.4 (build 15F5079a) is an official Apple over-the-air update for the iPad 6 (WiFi), released on 2018-05-17T17:02:16Z. The update package is 45.74 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: 3f308bfbb825c18440978ee414bd14b713b82821.zip.