watchOS 5.2 (build 16T5225a) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm), released on 2019-03-18T17:15:47Z. The update package is 169.93 MB. This is a delta (partial) update that requires 5.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 09b24a4667093b3a459ede4ee1e8587d991db48e.zip.