Idea tells Trai to fix IUC by separating VoLTE, other networks

Reliance Jio operates on the VoLTE network while the rest of the telecom industry, which includes Idea, Airtel and Vodafone, follow the time division multiplier (TDM) networks using 2G, 3G or 4G technology
Source: Livemint.com (http://www.livemint.com/rss/industry)