Ern is right...some of those cards are rackets.
However, I heartily recommend TracFones. The minutes are cheap, I even get a signal at scout camp. What’s funny is how (very seldom) I’ve looked down at the phone and seen “roaming” but it doesn’t matter a bit because the phone only counts how long I’m on and couln’t care less where I am.
What does the cost per minute come out to be?