MagicJack promises a full refund if returned within 30 days. Well, that's not quite the reality. I placed the order on January 13; received it a couple days ago; and yesterday printed off the return instructions. They stated I had to have it back to them by February 3 before they would grant a refund. I don't think that is 30 days. AND, I don't think I'll get back the $6.95 shipping (and handling) they charged me to have it sent via US Mail.
I do not recommend magicJack. Try Skype instead.