PSA: If your Apple Watch upgrade to watchOS 2 fails, here’s the solution

It seems I’m not the only person to have experienced issues upgrading my Apple Watch to watchOS 2. After swearing at it for its insistence that it needed both more than 50% power and to be on charge (it refused to play even when on 100% power), it finally agreed to update itself and then stalled overnight during the ‘Verifying’ stage.

Starting again, the update then crashed the watch. Rebooting the Watch didn’t fix it, nor did rebooting the iPhone and starting the process again. What did fix it? Read on…