iPadOS 11.4.1 (build 15G77) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2018-07-09T17:08:03Z. The update package is 195.09 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: 263f0e25744f326d6d838289cb754eaa16136aa3.zip.