I got my JIO sim card last week and got it activated on 5th September. I am using the sim card in my One plus two mobile phone and through JioJoin mobile app I can use VoLTE calls. VoLTE stands for Voice Over LTE, it simplest term this technology uses voice as data packets delivered through LTE network. That means your voice is carried in the same way as other streaming services. This approach results in the voice service (control and media planes) being delivered as data flows within the LTE data bearer. This means that there is no dependency on (or ultimately, requirement for) the legacy circuit-switched voice network to be maintained. VoLTE has up to three times more voice and data capacity than 3G UMTS and up to six times more than 2G GSM. Furthermore, it frees up bandwidth because VoLTE’s packets headers are smaller than those of unoptimized VoIP/LTE. In india Reliance Jio is the first service provider that started commercial launch of 100% VoLTE service without 2G/3G based services in India on 5th Sep 2016. Jio has announce that all voice calls over LTE is free and only data consumption chargeable. This does not hold good with other telecom operators, those for years were charging customers for data as well as voice. With Reliance Jio’s entry, these service providers are little bit shaken with tough competition ahead for them to survive. In fact, some of the telcos are already in firefight mode and said “Not bound to give interconnect points to Reliance Jio: Telcos to PMO”. There are lots of call drops from Jio network to other networks and Reliance supremo “Mukesh Ambani to telcos: You cannot break the law beyond few weeks“. There are going to be more firefighting, might be more uglier in coming days. The winner in this battle is definitely the *consumer*.