iPadOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2018-05-29T17:14:26Z. The update package is 612.83 MB. This is a delta (partial) update that requires 11.2.6 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 3aa754e94997d1adfe446d0400845a33af1f8689.zip.