iPadOS 12.0 (build 16A5357b) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2018-08-15T17:06:28Z. The update package is 1.17 GB. This is a delta (partial) update that requires 11.4.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 92aac247afa4f792672199578f651ab3866a09e7.zip.