watchOS 4.3.2 (build 15U70) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2018-07-09T17:08:16Z. The update package is 408.4 MB. This is a delta (partial) update that requires 4.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a986c6a9ecb946c2a184abe41af27b94da71ff88.zip.