watchOS 5.3.6 (build 16U662) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2020-03-24T17:21:13Z. The update package is 38.08 MB. This is a delta (partial) update that requires 5.3.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 82314a1f14f5e9326b7b9719e76059a72f149364.zip.