You may have heard that most of the big cell phone companies have made evenings, weekends free, and many have made calls within their network free. So, if one Cingular customer calls another Cingular customer, it doesn’t cost either person a cent. But if you go outside the network, and call on a landline or other cell phone, you are charged for the call or deducted minutes. Well, one company has found a way to circumvent that exclusive system. The name of the company is Xcelis. It has made it possible to call members of other networks with unlimited calling, by leveraging your unlimited minute plan. So, you’re a Cingular customer, you would call another Cingular number, which is a free call. That number is actually an Internet computer switch that is rerouted over the Internet to anyone you want to call regardless of his or her provider. It blows apart the business model of per-minute calling, and has the big companies furious. It’s available right now for Verizon and Cingular customers, and the others will soon be added. So, what does Xcelis get out of it? The company charges a $10 monthly fee for the service. The folks at Verizon claim they will cut off phone service to anyone who uses Xcelis. We’ll see what really happens. For right now, if you’d like to try out Xcelis, the company is offering a 7-day trial period for free. Go to xcelis.com.