iPadOS 12.1.3 (build 16D39) is an official Apple over-the-air update for the iPad mini 3 (Cellular), released on 2019-01-22T18:05:00Z. The update package is 1.58 GB. This is a delta (partial) update that requires 10.3.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 470395213852a8f4d5504cb5a7a23181909d21eb.zip.