watchOS 4.2.2 (build 15S542) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2018-01-19T18:08:45Z. The update package is 145.89 MB. This is a delta (partial) update that requires 4.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 08e6ae986d44a2903cdd94cc9af44d6fb52c7c2b.zip.