The airtel has adopted Circuit Switched Fall Back (CSFB) technology for providing voice calling facility over its 4G LTE networks in the country. With CSFB technology deployed within the network, the airtel would be able to offer voice to its LTE subscribers through its 3G and even 2G network.
Bharti succeed in trial of CSFB in february 2013 in metro cities like Pune, Kolkata and Banglore.The airtel has partnered with Huawai and other 4G devices in India. Airtel has been testing 4G LTE smartphones from Samsung, ZTE and other Indian smartphone vendors such as Micromax on its 4G LTE network.
The company has been offering 4G data services in Pune, Kolkata, Chandigarh, Mohali, Panchkula and Banglore.
