watchOS 4.2.2 (build 15S542) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2018-01-19T18:09:13Z. The update package is 214.87 MB. This is a delta (partial) update that requires 4.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: be2a6189045561b95673cee29a6ac6af029cbef6.zip.