iPadOS 12.1.1 (build 16C50) is an official Apple over-the-air update for the iPad Air (WiFi), released on 2018-12-05T18:07:13Z. The update package is 1.22 GB. This is a delta (partial) update that requires 11.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4b074c6b0de43cb52c3267febf30759edbd8d80c.zip.