watchOS 5.2 (build 16T5222a) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm), released on 2019-03-11T17:11:43Z. The update package is 436.53 MB. This is a delta (partial) update that requires 5.1.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a95abf4070afba0d68ef0435bd1947b83d0358ce.zip.