Incumbent Telecom Operator Bharti Airtel Ltd has been managing 2G / 3G and 4G Networks. Though off late, they are re-farming the 3G Spectrum to 4G LTE Network. An achievement worth mentioning is that Airtel has offloaded 37% of its Voice Traffic to VoLTE. This is made possible with the mass availability of VoLTE compatible handsets in the market. Additionally, 38m subs can use VoWi-Fi based on device compatibility; 2m are the daily active subs and 5m+ users have used this service till now at least once. Post Airtel VoWi-Fi rollout, there has been a 73% increase in call duration and 42% reduction in failed call attempts due to improved indoor experience.
850MHz acquired from Tata Indicom is actively used by Airtel. Airtel has 850MHz wireless spectrum in 5 circles though it has 5MHz in none of these. In two circles, it uses the 850 band for LTE. Being sub 1 GHz spectrum, it is used to improve reach and