iPadOS 11.4.1 (build 15G77) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2018-07-09T17:07:57Z. The update package is 617.1 MB. This is a delta (partial) update that requires 11.2.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 7349af187597023841abe881f9c358d31991afad.zip.