iPadOS 12.3 (build 16F5129d) is an official Apple over-the-air update for the iPad mini 2 (China), released on 2019-04-08T17:03:58Z. The update package is 269.33 MB. This is a delta (partial) update that requires 12.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f0dd40bc33ca04f9354e471676b825a7b1c63a94.zip.