watchOS 5.2.1 (build 16U6113) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2019-05-13T17:17:27Z. The update package is 84.01 MB. This is a delta (partial) update that requires 5.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 0c2119e60703f78b4f7d7648f2ea76812a59419c.zip.