VoLTE, or Voice over Long-Term Evolution, is the method by which mobile service providers utilize the 4G network for voice calls as well, instead of just data. The biggest advantage of handling voice calls over the 4G network is that the greater bandwidth allows for better quality voice calls. Operators claim that these are high definition (HD) quality voice calls. There will be lesser call drops, greater voice clarity, and operators also claim that calls get connected significantly faster, in comparison with standard voice calls over 3G and 2G networks. VoLTE will be the next big feature that could significantly improve the voice calls experience this year, once the rollout is wide enough and users sign up in large numbers.

Source: Mint January 16, 2018 05:03 UTC