watchOS 5.2 (build 16T5201c) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2019-02-19T18:15:58Z. The update package is 486.54 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: 1c788fffe182d2e9fd004fd80faf06ecfa276c16.zip.