watchOS 5.2 (build 16T5225a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-03-18T17:14:26Z. The update package is 486.31 MB. This is a delta (partial) update that requires 5.1.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 09d08e9dc315339f17f07d83509ac64eb434468d.zip.