iPadOS 12.1.3 (build 16D5037a) is an official Apple over-the-air update for the iPad 6 (Cellular), released on 2019-01-07T18:06:52Z. The update package is 238.6 MB. This is a delta (partial) update that requires 12.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 9c6b8f73c105dd5b57b7236a0acf341f9c45c26c.zip.