watchOS 2.2.1 (build 13V420) is an official Apple over-the-air update for the Apple Watch (42mm), released on 2016-04-20T17:10:16Z. The update package is 26.9 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: bef0645fcfecfdb9768b096123e5e57ee9260555.zip.