watchOS 5.2 (build 16T5181f) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2019-01-24T18:07:59Z. The update package is 483.85 MB. This is a delta (partial) update that requires 5.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 775935403c31762bcf3983e3dd70d1eb131364dd.zip.