iPadOS 12.0 (build 16A5366a) is an official Apple over-the-air update for the iPad mini 4 (WiFi), released on 2018-08-31T17:07:21Z. 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: 55ff536f5d5c4eb5c3f07f90adc8dce7701c9bf4.zip.