Today, when more and more people everyday are traveling around the world, the need for fast and efficient communication becomes extremely visible. Roaming customers are not satisfied anymore by basic voice or SMS/MMS services. Customers expect services like Voice Conferencing, Presenceand Location- based services and many others. As such were simply not available in the past, or roaming of those services was technically difficult and would not ensure reasonable return of investment (ROI). The challenge for ...