I need to take credit cards for my business

I was looking for a company to accept credit cards on the road, but the mobile terminals they are trying to sell my are expensive. I found a company called Cell Charge at www.cellchargemerchant.com and they say I can take them on my cell phone without buying anything extra. They also say that I don't have a contract, I can cancel anytime. It only costs $5.99 a month plus processing. Has anyone heard of these guys?

Thanks