It's good for one time and OR short calls. Once you get $10 free, it cut down to 7.5 cents per min. It never expires even if you make 1 min. call next 6 months or so, another good thing is you can save your Tel. no (Nepal no) as you save your friends no (no need to enter 011...977...and pin no.) Just a press away. And the best thing is if you have more phones in your family you can refer them and you get $10 and they $10 and it goes on and on.....