Reliance Jio has become a major setback to all telecom companies with 4G VoLTE technology in India, since then the pressures of telecom companies are under pressure to bring 4G VoLTE technology as soon as possible. Reliance Jio is the first telecom company that has launched the VoLTE service in India, but now Airtel is preparing to challenge Reliance Jio. Bharti Airtel has also launched its 4G Voice Over LTE service. Bharti Airtel has started 4G VoLTE services in Mumbai and will be made available throughout the country in the coming months. Airtel VoLTE service will work on 4G network and now Airtel customers will also be able to take advantage of free HD quality video call and voice call service like Reliance Jio.