Using GrandDialer is pretty simple. However, you first have to configure it.
1. Tap on Settings on the keypad if it isn't already displayed.
2. Enter your GrandCentral username and password.
3. Tap on Edit Numbers; here is where you enter YOUR numbers such as your iPhone, home phone, or Gizmo5 number. When you dial a number from GrandDialer, it will call the number you select here and connect you with the number you enter on the keypad. Do NOT enter your GrandCentral number here.