watchOS 2.2.1 (build 13V413) is an official Apple over-the-air update for the Apple Watch (42mm), released on 2016-04-06T16:50:09Z. The update package is 114.49 MB. This is a delta (partial) update that requires 2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 1b018d1c19c8113529fad03d4930443503423169.zip.