Prepaid Voip What Is Cheapest USA Mobile Plan/prepaid That Supports Voip?

What is cheapest USA mobile plan/prepaid that supports voip? - prepaid voip

I would like to use VoIP on your mobile phone. This requires a 3G service such as Verizon, Sprint EV-DO and CDMA2000. What is the stock option program, because I do not use the calling minutes, only for broadband? Are there any plans prepaid data? I have to commit for 2 years, even if I put my own phone?

I have tried to investigate this in the part of suppliers, but there are so many plans and so much hype ... and so little information! I can not imagine being alone to do so. Thank you!