watchOS 5.2 (build 16T225) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2019-03-27T22:03:54Z. The update package is 898.88 MB. This is a delta (partial) update that requires 4.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 452f9c553d968fb78dd08789244ae7c82e25bf99.zip.