watchOS 5.2 (build 16T5212e) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm, LTE), released on 2019-03-04T18:11:27Z. The update package is 156.85 MB. This is a delta (partial) update that requires 5.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 852a42cfa91ae418e7a042d208b912690a61a8f1.zip.