watchOS 5.2 (build 16T5222a) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2019-03-11T17:11:22Z. The update package is 520.09 MB. This is a delta (partial) update that requires 5.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 0def9a64ebc4e5b35d1aadcbc10b32c1c34aaafb.zip.