iPadOS 12.1.1 (build 16C50) is an official Apple over-the-air update for the iPad 6 (Cellular), released on 2018-12-05T18:09:38Z. The update package is 1.27 GB. This is a delta (partial) update that requires 11.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 1597ebd686321c0b0ae6bf6daa0c351064ab5bea.zip.