iPadOS 12.0 (build 16A366) is an official Apple over-the-air update for the iPad mini 3 (Cellular), released on 2018-09-12T19:05:55Z. The update package is 1.22 GB. This is a delta (partial) update that requires 11.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 541b1b6b7106865de6709c51928c44723ebcbf81.zip.