watchOS 5.2 (build 16T5181f) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-01-24T18:07:57Z. The update package is 466.82 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: 15f0bf427a0cdb196d126db927fd0a4efc6114a6.zip.