Although most mobile phone users consider their call rates relatively costly, only a few technology pioneers try free phone calls when they learn about the possibility. Most people are aware of Skype service that can be accessed on a PC, but only a few pioneers have tried it on their smartphones. This is puzzling because Skype provides free phone calls for smartphones as well. If your phone isn’t compatible with Skype, other options are available. For instance, Fring and Truphone services provide free and low-cost phone calls for smartphones as well. But what if you want video calls like on a PC webcam? No problem. Here’s how…