watchOS 5.3.5 (build 16U652) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2020-02-18T18:06:56Z. The update package is 41 MB. This is a delta (partial) update that requires 5.3.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 05eee2e53a09f126f0755b034e1b2dd40ea37731.zip.