watchOS 5.2 (build 16T5222a) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm), released on 2019-03-11T17:11:46Z. The update package is 474.67 MB. This is a delta (partial) update that requires 5.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b9f69d8beac411d1f63dd1c35ed802a2988e21c9.zip.