Magic Jack is HORRIBLE!!! We got it about 6 months ago and the call quality is terrible, the people you are talking to can rarely hear you, you can't hear anything coming through, half the calls were just static, it would disconnect randomly, and I'm pretty sure they sold our number to telemarketers cause they never stopped.
But I have AT&T and it works pretty well for me. My phone is an ancient Sony Walkman flip phone cause I broke my LG VUE