watchOS 5.2 (build 16T5181f) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm, LTE), released on 2019-01-24T18:08:35Z. The update package is 449.35 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: be80f4b826666dba9d311c5bc5a349265c85da47.zip.