watchOS 5.2 (build 16T225) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2019-03-27T22:03:58Z. The update package is 503.23 MB. This is a delta (partial) update that requires 5.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a28181e2b531c832ce3e9f7f8bee8a769b5874c3.zip.