watchOS 5.2 (build 16T5181f) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm), released on 2019-01-24T18:08:12Z. The update package is 439.22 MB. This is a delta (partial) update that requires 5.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 3420a748beb34736159c7fad0c35e3e8b02903ef.zip.