watchOS 6.0 (build 17R5546f) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-07-30T17:09:37Z. The update package is 738.97 MB. This is a delta (partial) update that requires 5.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 86c93290dcba25749fef9a74c5383ab788312354.zip.