When someone asks me what service provider I have I tell them Sprint. A typical response is "Why Sprint?".
The answer is because it is free and it works well.
About a year ago I paid a $5 one time fee to open a ringplus account. I get 1500 minutes, 1500 texts and 500MB data each month. As long as I don't go over (which I never have) there are no other charges.
There are still free plans (different than the one I have) available and you can bring your own CDMA device. This is just a tip for the other people that do not like paying for something they rarely use anyway.
Here's the link: ringplus.net