"Airtels 4G services in the national capital region are the first in India to leverage an integrated FD and TD network which will deliver the fastest 4G experience and superior network coverage," Airtel said in a statement.
"Today, as we launch Airtel 4G trials exclusively for our existing customers in Delhi NCR our customers in the region will be uniquely positioned to experience Indias first integrated FD and TD 4G network," Bharti Airtel (India) Hub CEO (Delhi NCR and Rajasthan) Sarang Kanade said.
According to sources, Ericsson is providing the network for FD (1800 Mhz) and Huawei for TD (2300 MHz) network.
Airtel has also announced a go-to-market partnerships with Samsung and Flipkart for 4G devices. Earlier in April 2012, Airtel had launched the country's first 4G service in Kolkata.
Airtels 4G services are now available across over 30 cities, including Chennai, Bengaluru, Pune, Chandigarh and Amritsar.