iPadOS 12.0 (build 16A366) is an official Apple over-the-air update for the iPad mini 3 (China), released on 2018-09-12T19:06:05Z. The update package is 1.18 GB. 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: 69c0319ff1803f00f81546ae2b62dacfa3ba9e6b.zip.