watchOS 5.2 (build 16T5225a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-03-18T17:14:21Z. The update package is 502.99 MB. This is a delta (partial) update that requires 5.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 467c93a38a68cc658962b95990cdc08fa8be018f.zip.