iPadOS 12.1 (build 16B5084a) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2018-10-15T17:03:01Z. The update package is 356.2 MB. This is a delta (partial) update that requires 12.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 604a912358611bf6f772a86e6b32bc0724154de9.zip.