anywhere and it will be billed on your phone bill. Depends on your lone distance plan, if you use it in north america, the charge is as same as your home line, but some of plans, there is a surcharge when you use your phone card. If you use your calling card to call local phone number, it is $.75 per time.
Also there is another Call Me card, your home phone number will be shown on it. You can use it call back to your home phone number only. The rate is exactly as same as your home line when you call in north america, but there is no surcharge. Same, when you call local number, $.75 per time.