watchOS 6.0 (build 17R5571a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-08-21T17:10:54Z. The update package is 737.64 MB. This is a delta (partial) update that requires 5.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 5314c7f08433555ef911a3491c7829a84b5e7e04.zip.