watchOS 6.0 (build 17R5556d) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-08-07T17:14:06Z. The update package is 737.76 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: 1e0d6a699728adc60013acd9c0ab15f8822cf305.zip.