iPadOS 12.1.1 (build 16C50) is an official Apple over-the-air update for the iPad 5 (Cellular), released on 2018-12-05T18:08:37Z. The update package is 1.65 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: ede6ebe600448a1d1d17157acf5f4d3ec12a504b.zip.