watchOS 3.0 (build 14S5290d) is an official Apple over-the-air update for the Apple Watch (38mm), released on 2016-07-18T16:52:59Z. The update package is 914.62 MB. This is a full OTA update that can be applied from any compatible base version. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 33a6ca5df0cbb9dda1c0ec847b9410664dca5c44.zip.