Signed up, used to to make an international call and had $10 balance. I went to use it a month later, and had 0 balance and said account not valid (had the app). I emailed, they said I had to call. I called, told me a 2 minute wait, waited for about 50 min and then they just hung up on me. I emailed again and told them all that, and told them they better refund my money or fix it...nothing.