A security conference held this week brought up information from studies that indicate it’s really easy to hack into other people’s phone calls. The studies show that cell phones using GSM technology as well as most VoIP systems have security flaws which make it affordable and simple for someone to listen in on your calls as well as to track your location through the phone. Eavesdropping, forced calls, interrupted calls, fake voice messages and stalking are some of the problems people apparently face when using cell phones and VoIP services. Bear in mind, though, that the information is being presented at a conference specifically designed to exploit security flaws; we’ve heard a lot about VoIP security flaws in the past but most of the predictions about problems have not yet come to pass.