iPadOS 12.1.3 (build 16D5032a) is an official Apple over-the-air update for the iPad mini 4 (WiFi), released on 2018-12-19T18:06:37Z. The update package is 226.8 MB. This is a delta (partial) update that requires 12.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 51d0d88fe1380e97d98bcf4f044320fdaf78b2cb.zip.