iPadOS 12.1.3 (build 16D39) is an official Apple over-the-air update for the iPad mini 3 (Cellular), released on 2019-01-22T18:04:58Z. The update package is 1.6 GB. This is a delta (partial) update that requires 10.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f66bb013f291c9a25b62079120e50b06d795b440.zip.