Bharti Airtel Limited (commonly Airtel and Stylized Airtel) is a global telecommunications service company based in New Delhi. 

It is operating in 20 countries in South Asia and Africa. GSM, 3G, 4G LTE mobile services, fixed line broadband and voice service are available on the basis of Airtel operations. Airtel had started its Voltage technology in all the Indian telecom boards except Jammu and Kashmir and is likely to be launched soon. It is the second largest mobile network operator in India and has the third largest mobile network operator in the world with more than 438.04 million subscribers. Millward Brown and WPP Plc nominated India's second most valuable brand in Brand Ranking. 

Airtel is credited with the outsourcing business strategy, excluding marketing, sales and finance, and with a low-cost 'minute factory' model building. Many operators have accepted this plan Airtel's equipment is supplied and managed by Ericsson, Huawei and Nokia Networks and IT support is provided by IBM. Transmission towers are managed by Bharti's subsidiaries and joint ventures companies including Bharti Infratel and Indus Towers in India. Ericsson agreed to pay the first time for the first time by paying money to install and maintain their equipment rather than paying for the first time, so that Airtel could be given low call rates.

In 1992, he successfully banned one of the four mobile phone licenses that auctioned in India. One of the condition of the Delhi cellular license is that the bidder has some experience as telecom operators. So, Mittal has signed with French telecom group Vivendi. He was the first Indian entrepreneur to be known as the main development area of ​​mobile telecom business. Finally, they were planned in 1994 And he started service in Delhi in 1995, when Bharti Cellular Limited (BCL) was set up to provide cellular services under Ertel's brand. In some years, Bharti became the first telecom company to exceed 2 million mobile subscribers. Bharti lowered the STD / ISD cellular rates in India under a brand named 'Indianon'.

In 1999, Bharti Enterprises took control of JT Holdings and increased cellular operations in Karnataka and Andhra Pradesh. In 2000, Indians took control of SkySales Communications in Chennai. In 2001, the company took control of Spice Cell in Calcutta. Bharti Enterprises became public in 2002 and the company was listed on the Bombay Stock Exchange and National Stock Exchange. In 2003, cellular phone operations were re-branded in a single airtel brand. In 2004, Indians took control of hexacom and entered Rajasthan. In 2005, Bharti extended its network to Andaman and Nicobar Islands. This extension allowed voice services across India.

In July 2004 Airtel launched the collar ring back tone service (CRBT) "Hello Tune" to become India's first operator. Airtel Theme Song AR Rahman was the most popular tune of that year.