iPadOS 11.4 (build 15F5071a) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2018-05-07T17:11:11Z. The update package is 247.23 MB. This is a delta (partial) update that requires 11.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 9025d1a253f0d63f3112300693187245f7ea928b.zip.