watchOS 5.2 (build 16T5212e) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm, LTE), released on 2019-03-04T18:11:20Z. The update package is 476.11 MB. This is a delta (partial) update that requires 5.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 628a39d2e8447d3b9709bb066336ab5c97a5fe13.zip.