iPadOS 11.4.1 (build 15G77) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2018-07-09T17:07:49Z. The update package is 617.15 MB. This is a delta (partial) update that requires 11.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 8fa4dc52b6be0f7a6235b0047ee5c4afad647aa6.zip.