Source: Heavy Reading
Cellular operators worldwide are building, trialing, or planning Long Term Evolution (LTE) networks at an ever-increasing pace. Initially they will use the emerging high-speed wireless technology to provide data services mobile Internet access. But the recent development of a technical foundation for delivering voice calls over IP Multimedia Subsystem (IMS) network infrastructure in the form of the voice over LTE (VoLTE) spec finally provided a standardized way to deliver voice calls in addition to broadband data services over LTE networks. Thus it would seem that there is little to keep VoLTE services from spreading worldwide, as well.