iPadOS 12.1 (build 16B5059d) is an official Apple over-the-air update for the iPad mini 3 (China), released on 2018-09-18T17:20:08Z. The update package is 339.99 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: a2d3041a8e1cb65b0e8115abbe84392636711877.zip.