watchOS 2.2.1 (build 13V5420) is an official Apple over-the-air update for the Apple Watch (42mm), released on 2016-04-20T17:10:25Z. The update package is 54.6 MB. This is a delta (partial) update that requires 2.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4929616bb2ba014863cc0a50c682ca74862f29ee.zip.