iPadOS 11.4.1 (build 15G77) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2018-07-09T17:07:50Z. The update package is 613.36 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: 74444e9770d5899cc0b4242b46bfd3fea7bcf49c.zip.