watchOS 5.2 (build 16T5191d) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-02-04T18:13:46Z. The update package is 471.6 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: afbab703a96864c8cff03ac64cc943e0ccad1546.zip.