watchOS 5.0 (build 16R5303d) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2018-06-19T17:36:40Z. The update package is 265.82 MB. This is a delta (partial) update that requires 5.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: eaad2d6feec6660560f7c070cc5509f7c0fd4e1d.zip.