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A smartphone is significantly more than just a device for making phone calls, as it corresponds more to a personal digital assistant with a variety of different functionalities. Additionally, a smartphone enables you to make VoIP phone calls from public WiFis and hotspots. Smartphone would be, for example, the iPhone, Blackberry, Sony Ericsson Vivaz, Motorola Milestone as well as the newest cell phones produced by providers like Samsung and Nokia. Today, smartphones are on the rise, and so is the creation of new smartphone apps. Of course, you can also use DCalling with your smartphone. You can either set up your VoIP client for DCalling or use the CardCaller app.