watchOS 4.2.2 (build 15S542) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2018-01-19T18:08:43Z. The update package is 573.71 MB. This is a delta (partial) update that requires 3.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d5d7cba63d61cc21b7b0d8190e9d5d9d439241d9.zip.