iPadOS 12.0 (build 16A5357b) is an official Apple over-the-air update for the iPad mini 3 (China), released on 2018-08-15T17:06:24Z. The update package is 156.26 MB. This is a delta (partial) update that requires 12.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: e5fd13090a69a6ef13c03ac4288bb7ff88dba50c.zip.