watchOS 5.2 (build 16T5225a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-03-18T17:14:30Z. The update package is 486.37 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: bdf529800139aed1a1a0be53822d66b28e5ee3f2.zip.