watchOS 4.3 (build 15T6212) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2018-03-29T17:08:17Z. The update package is 81.84 MB. This is a delta (partial) update that requires 4.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 6aace7a51f81358ca4d27f5d9149493bd6b1160c.zip.