iPadOS 12.1 (build 16B92) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2018-10-30T17:05:50Z. The update package is 1.6 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: f732d7e72dbf291d4d03a6655cf5a26154272d66.zip.