iPadOS 12.1 (build 16B5077c) is an official Apple over-the-air update for the iPad 6 (WiFi), released on 2018-10-09T17:05:38Z. The update package is 418.72 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: 4b3185644a0272f1f268b0e7fca9ff851cd18dbb.zip.