watchOS 5.2 (build 16T5222a) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm, LTE), released on 2019-03-11T17:12:02Z. The update package is 457.18 MB. This is a delta (partial) update that requires 5.1.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 03a6ddd339f2282114774d2ced8a769f3171efe4.zip.