Bharti Airtel (formerly Bharti Tele-Ventures), a part of Bharti Enterprises, works through three individual SBUs -mobile services, broadband and telephone services and enterprise services. The company, established in 1995, is a public limited company and is headquarted in New Delhi, India. The company provides GSM mobile services across India in 23 telecom circles, while the B&T business group provides broadband & telephone services in 15 circles. The enterprise services group has two sub-units - carriers (long distance services) and services to corporates. Bharti Airtel is the largest mobile telephony operator in the GSM space with around 27 per cent market share in FY05. The company, apart from being the largest player in the mobile segment with subscribers in all the 23 telecom circles of the country, also provides varied services like fixed line, broadband and retail internet access. The company is also one of the fastest growing fixed line and long distance (DLD as well as ILD) operators in the country. It offers broadband and other data oriented services to corporate clients. The company has a strategic alliance with Singtel, the largest of its kind made by SingTel outside Singapore. The company also has a strategic alliance with Vodafone, which is one of the largest single foreign investments made in the Indian telecom sector. Bharti Airtel plans to foray into the retail segment, through a joint venture, which would be finalised depending on the kind of infrastructure required for the retail foray.