watchOS 6.0 (build 17R5546f) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-07-30T17:09:38Z. The update package is 738.66 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: 23c29989bb2013fda54f424a8b05c0b9d66e4d76.zip.