watchOS 5.2 (build 16T5181f) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-01-24T18:07:52Z. The update package is 500.72 MB. This is a delta (partial) update that requires 5.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f5a865669c33a00fd89f0a7dde44f2b5ba2dfa3f.zip.