iPadOS 12.4 (build 16G5077a) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2019-07-16T17:39:04Z. The update package is 142.07 MB. This is a delta (partial) update that requires 12.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 9e4954ca0be71644cefe4b2dd79bcbacb140dc71.zip.