How to download watchOS 2 on your Apple Watch

[iMore.com]

Because Apple Watch is paired to the iPhone for internet access and easy device management, watchOS updates are done using the Watch for iPhone app. To install watchOS 2, you need to first update your iPhone to iOS 9. Once that's done, make sure you have your iPhone ready and on Wi-Fi, and your Apple Watch charged to 50% or more and connected to its magnetic charger.

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