watchOS 5.2 (build 16T5222a) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm, LTE), released on 2019-03-11T17:11:58Z. The update package is 495.08 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: 27e958423de25e13186afdf3a614e4feafa67999.zip.