iPadOS 12.1.3 (build 16D39) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2019-01-22T18:05:44Z. The update package is 384.77 MB. This is a delta (partial) update that requires 12.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: caf5c377a0eff886440675063d1dfd7b5688b558.zip.