watchOS 5.2 (build 16T5225a) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm), released on 2019-03-18T17:15:48Z. The update package is 140.74 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: d405b5543f7c4442232031da89a3e97547caf43f.zip.