20 - 40 minuten
When the phone had the vibrator switch turn on the phone would vibrate with a simple shaking of the phone. this led me to believe that the onctacts were having an issue.
The repair went very well, it was a very simple fix. After installing the new vibrator the phone works properly.
Don't be intimidated by the perceived complexity of the iPhone. They are assembled by humans so with a little bit of training a human can easily fix one.