Launching Voice over LTE (VoLTE) and Voice over WiFi (VoWiFi) has for some time been seems to be yet “another” large project operators are undertaking with more or less success and driven both by the need for operational efficiencies and customer demands.
The question is whether the colossal time and efforts that are being spent by operators to make the efficient IP-only LTE (or 4G) networks backward compatible will ever payoff? The main drivers seem to be efficiencies in spectrum and the promise of being able to provide convergent services based on IP. Moving voice calls to data networks at least in theory means a simpler network to manage and thus lower operational costs. Other industries such as digital and media have been successfully delivering these types of services for years, eating into the two cash-cows on which telecoms has been built, namely voice and messaging, only at a fraction of the investment.