Mobile TeleSystems OJSC, together with its subsidiaries, provides telecommunications services primarily in the Russian Federation, Ukraine, Uzbekistan, Armenia, and Belarus. The company provides a range of mobile and fixed line voice and data telecommunications services, including transmission, broadband, pay-TV, and various value-added services; and sells equipment and accessories. It also offers network access services, including mobile cellular voice and data communication services; automatic roaming services; GPRS and Internet access services; and 3G technology. In addition, the company’s services include the design, construction, and installation of local voice and data networks capable of interconnecting with fixed line operators; installation and maintenance of cellular payphones; lease of digital communication channels; and provision of access to open computer databases and data networks, including the Internet, as well as video conferencing, and fixed, local, and long-distance telecommunications services. Its value-added services comprise call divert/forwarding, caller ID and anti-caller ID display, conference calling, WiFi, GPRS, intelligent call assistant, APN remote access point, fixed mobile convergence, enhanced data rates for GSM Evolution, call barring, SMS, mobile office, voicemail, mobile banking, wireless application protocol, MTS-Connect, SIM-browser, point-to-point transfer, unstructured supplementary services data, downlink packet access, mobile TV, call waiting, MMS, ring tones, missed call alert, itemization of monthly bills, information and directory, international access, WEB and WAP portal, customer care system, ring back tone, collect call, and location-based services. As of December 31, 2011, the company had a mobile subscriber base of approximately 101.14 million. It has a strategic partnership with Vodafone. The company was founded in 1993 and is headquartered in Moscow, the Russian Federation.