Ericsson Mobility Report has predicted that VoLTE subscriptions will reach 4.6 billion in 2022, making up more than 90 percent of all LTE subscriptions globally.
There are currently more than 1,000 VoLTE-enabled device models.
More than 100 networks in 55 countries have launched VoLTE.
VoLTE uptake was very strong in 2016 in the US, Japan, South Korea and Canada. Most networks have more than 60 percent of voice calls on LTE smartphones provisioned using VoLTE. In some networks this figure was close to 80 percent.
VoLTE in Europe is growing slow because mobile subscribers are yet to configure VoLTE themselves in the device settings, or to buy a special VoLTE subscription. Due to launches in China and India, more affordable VoLTE devices will be available soon.
Ericsson said VoLTE technology is the foundation for communication services on any device over LTE, Wi-Fi and 5G.
VoLTE, delivered via the IP Multimedia Subsystem (IMS), enables operators to offer simultaneous voice and LTE data services on smartphones and other devices.
Wi-Fi calling is built on the same core network systems as VoLTE, and enables operators to extend their voice service to places with limited cellular coverage. Over 50 Wi-Fi calling networks have been launched in more than 30 countries.
