iPadOS 13.3.1 (build 17D5050a) is an official Apple over-the-air update for the iPad 6 (Cellular), released on 2020-01-22T18:07:11Z. The update package is 128.33 MB. This is a delta (partial) update that requires 13.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 88d0320b07d297961f45eb32926aea155fb55518.zip.