Techplained: What is Voice over WiFi calling and how does it work?

Last year, Indian telecom companies launched a service that largely went unnoticed. Struggling with connection quality and call drops, some operators rolled out voice over WiFi features. While voice over LTE (VoLTE) was made famous by Reliance Jio for high definition calls, looking at heavy traffic and poor connection ranges almost all major telcos have been rolling out voice over wifi, to aid users at places where signal strengths are weak.

What is Voice over WiFi calling and how does it work?

The concept of WiFI calling is not something alien to most people. Anyone who has ever made a WhatsApp call knows what VoWiF is. But to understand VoWiFi, it is important to understand how VoLTE works. VoLTE uses data flows in order to deliver better quality than the circuit lines. It also uses lesser bandwidth than some unoptimised VoIP services.