MTS, the Largest Mobile Operator in Russia and the CIS, is launching Silent Communication’s Call Management and Visual Voicemail mobile client

March 2009 – Silent Communication, a leading provider of real-time call management and visual voicemail solutions for mobile handsets, today announced that MTS (NYSE: MBT), the largest mobile phone operator in Russia and the CIS, is going to launch the TalkinSilent™ Call Management and Visual Voicemail mobile client in April, offering an enhanced communication experience to its subscribers. The client has already been launched by five major Indian operators last month.

TalkinSilent™ Mobile Suite allows MTS to extend mobile experience of its subscribers by providing visual voicemail capabilities, offering new ways of getting and managing calls, adding conversational messaging, and more – all within the same mobile client.

TalkinSilent™ Mobile Suite enables mobile users to answer incoming calls with pre-recorded personalized voice and SMS greetings, experience SMS exchanges as “IM-like” chat and manage voicemails directly on the mobile handset. Being a set of intuitive and user-friendly clients, TalkinSilent™ Mobile Suite encourages voice and data usage and generates revenues starting from day one, while not requiring capital expenditures due to its server-less architecture.

Pavel Roytberg, Product and Service Development Director at MTS, commented: “Personalization, innovation, reach and quality of user experience are critical to our subscribers. By offering TalkinSilent™ Mobile Suite, MTS differentiates its services and delivers its subscribers innovative services.“

Max Bluvband, Silent Communication’s CEO, adds: “Following successful launches with Tier 1 operators around the globe, this particular launch of TalkinSilent™ in Russia demonstrates again operators’ awareness to advantages of enriched communicational experience brought by value added mobile client applications such as Visual Voicemail, “IM-Like” SMS messaging and Call Management.“

About Mobile TeleSystems (MTS)

Mobile TeleSystems OJSC (“MTS”) is the largest mobile phone operator in Russia and the CIS. Together with its subsidiaries, the Company services over 91.77 million subscribers. The regions of Russia, as well as Armenia, Belarus, Turkmenistan, Ukraine, and Uzbekistan, in which MTS and its associates and subsidiaries are licensed to provide GSM services, have a total population of more than 230 million. Since June 2000, MTS’ Level 3 ADRs have been listed on the New York Stock Exchange (ticker symbol MBT).

About Silent Communication:

Silent Communication is a leading provider of a new face for mobile Value Added Services, offers innovative client-based mobile solutions for Call Management and Visual Voicemail. Flagship products include TalkinSilent™ – Call Completion, Messaging solutions and Silent VVM™ – Visual VoiceMail client supporting all handsets and most of the voicemail providers.

Silent Communications is a privately held company, established in 2004, funded by private investors and Sequoia Capital VC. For more information please visit www.silentcom.com