Magicjack - USB device that adopts RJ11 port to connect a phone handset
to your computer. With your PC having internet broadband connection and
this Magicjack, you may have unlimitted calls to the US and Canada with
no charges applied. Only $20 annual subscription.
I got one, it was a
gift from my Uncle from the US, and so far I haven't tried it yet, but
we made an initial test calls in Hawaii and Minesota. The voice on both
part was clear and can hear even a pin drop.