NEW DELHI: Reliance Jio users will now be able to make voice and video calls using WiFi networks as the telecom operator has launched its voice and video over WiFi service across the country. The service will allow Jio customers to use any WiFi network for Jio WiFi-calling at no additional cost.The company in an official release on Wednesday said that the service supports over 150 handset models and works on any WiFi, anywhere in India. The service will be enabled pan-India between January 7 and January 16, 2020.Following Jio, Airtel will also be soon rolling out its VoWiFi service pan-India which will work with all WiFi networks, sources told ETTelecom. Airtel's service is currently available in Delhi, Mumbai, Kolkata, Andhra Pradesh, Karnataka, Gujarat, UP (West and East), Haryana, Punjab, Madhya Pradesh, Kerala and Tamil Nadu.Jio claims that the voice and video calls will seamlessly switch-over between VoLTE and Wi-Fi to provide an enhanced voice/video-calling experience.“At this juncture, when an average Jio consumer uses over 900 minutes of voice calls every month, and at a growing base of consumers, the launch of Jio Wi-Fi Calling will further enhance every Jio consumer’s voice-calling experience, which is already a benchmark for the industry with India’s-first all VoLTE network,” said Akash Ambani, Director, Jio.ETTelecom recently reported how Jio silently rolled out voice over WiFi (VoWiFi) calling service for its subscribers in multiple circles, including Delhi-NCR and Chennai, following a limited launch by Airtel in December 2019.The latest move will help Jio improve indoor voice calling experience for its users. VoWiFi addresses problems of insufficient coverage, especially indoors where even with the VoLTE.