India\'s Bharti Airtel has contracted Huawei to help it expand its TD-LTE network into the Delhi region in time for a September launch.

Huawei will build the operator\'s 4G network in Delhi, one of the natio\'s most valuable data markets. Delhi will become the fifth 4G LTE location for Bharti Airtel after rolling out the high end mobile Internet services in Kolkata, Bangalore, Pune and Chandigarh in the last 15 months.

Delhi is likely to get 4G by September, PTI reported on Sunday.

Airtel won the spectrum in these four circles during India\'s BWA auction in 2010, after bidding a combined 33.14 billion rupees ($542.4 million). The company subsequently acquired access to spectrum in Delhi and three other circles with the $165 million acquisition of a 49% stake in Qualcomm\'s 4G venture in India in 2012. The venture had been set up to acquire TD-LTE spectrum during the 2010 auction.

Airtel recently slashed 4G tariffs by 31 percent. The move is aimed at taking on Reliance Jio Infocomm, which invested Rs 12,847 crore for 4G license.

Airtel, which last year acquired 49 percent stake in US telecom chip major Qualcomm’s Indian 4G venture Wireless Business Services (WBS), said it would increase its stake to 100 percent by end of next year.

Qualcomm invested Rs 4,912 crore to win the BWA licence in four circles such as Delhi, Mumbai, Haryana and Kerala.

After Delhi, the billionaire Sunil Mittal-promoted Bharti Airtel will launch 4G services in Mumbai and the company is in talks with players such as Huawei and ZTE for network.

Airtel is betting big on data business. Bharti Airtel’s data ARPU in the first quarter of 2013 rose 81 percent to Rs 63 from Rs 55 in the same period last fiscal. In Q1 FY 2014, 24.4 percent of Airtel customers use data services from 20.6 percent in the corresponding quarter last year. Data consumption rose 117 percent to reach 27.3 billion MBs in the June quarter.

Data now contributes around 7.4 percent of the total mobile revenues against 6.5 percent in Q4 2013 and 4.3 percent in the corresponding quarter last year, depicting the shift from voice to data.