watchOS 5.2 (build 16T5225a) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm), released on 2019-03-18T17:15:46Z. The update package is 177.25 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: c8b68b04d304688f2cc9420c085da3ef7cb53214.zip.