watchOS 5.2 (build 16T5191d) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2019-02-04T18:13:48Z. The update package is 487.08 MB. This is a delta (partial) update that requires 5.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 786ffa5797c51269c727d95410f2eccf78dc031b.zip.