MtlWifi Telephone VOIP service The goal is to simplify VOIP to the point where almost anyone can use it. Once subscribed, the only setup needed is plugging the adapter into a USB port and any analog phone into the adapter: the device automatically installs and configures itself within a minute and is ready to use from then onwards. It currently supports only Windows and Mac but will be followed by Unix.   As with most voice over IP, the advantage is low-cost calling. Reaching other MtlWifi users is free regardless of where they live in the world, We differs from Skype in pricing. Instead of charging for every call to a real-world number, a $45 per year subscription ensures that every call in North America and parts of Europe is free.   Please contact us for a free trial of 1 month. Make unlimited calls in North America for free for only $45 per year