watchOS 5.2 (build 16T5191d) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm), released on 2019-02-04T18:14:15Z. The update package is 403.77 MB. This is a delta (partial) update that requires 5.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: bf9c8cf04bb2524f8f5cb6b45241dccb7fc3b4bf.zip.