What kind of cell phone offers the ability to just buy phone cards each month?

I need the cheapest cell phone possible. Both my home phone and cell phone aren't working and I need something that doesn't include a plan or long sign up process. I've heard that there's cheap cell phones you can buy, or even use your own, then just buy minutes as you use them each month. Where can I find something like this and what is it exactly?

The tracfone or what i have is Virgin mobile and i just bought the phone and card and activated it and that was it. Now i got a fone.

The BEST is get yourself a Tracfone!! Check this out, you will be OH so glad you did, no contracts, no bills, straight up. Nothing hidden - you can NOT do better people.

http://hubpages.com/hub/Why-Use-Tracfones--Or-what-IS-a-Tracfone-anyway http://answers.yahoo.com/question/accuse_write?qid=20080711130309AAIMahC&kid=PL8uO23CKXf_WbxtbF.1&s=comm&date=2008-07-20+13%3A15%3A02&.crumb=

the cheapest is virgin mobile.