Mobile operators in developed markets are now rolling out LTE smartphones to their customer bases. These devices require voice service support, but few operators have a clear strategy for the 'long-term evolution' of their voice services, both in terms of cost and revenue, and in terms of portfolio development.
This Viewpoint provides:
- an overview of the various technological options available to operators
- a status report of the major VoLTE deployments worldwide
- discussion of the various inputs to the VoLTE investment decision.