Mobile TeleSystems (MTS), the largest mobile phone operator in Russia and the CIS, was serving 85.68 million users on April 30, 2008. 
The company said it added 740,000 users during the month of April alone. The total number of subscribers is up 15% year over year. MTS has 60 million of its users in Russia and 19.5 million in Ukraine. The Moscow area alone counts nearly 14 million MTS users.http://www.mtsgsm.com/
