watchOS 6.0 (build 17R5571a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-08-21T17:11:02Z. The update package is 141.85 MB. This is a delta (partial) update that requires 6.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 49fd8fcc1a6111c963dfcefcfccec7582c4d58bc.zip.