MTS to bring innovative Social Address Book solution to Russia

Boston, MA. August 5, 2011— OnePIN, inc. the leading provider of CallerXchange and Social Connections Services, today announced that it has signed a contract with the largest mobile operator in Russia, Mobile TeleSystems (MTS) [NYSE: MBT] for its CallerXchange service.

“We are pleased to be working with MTS as we expand into the Russia market,” said Feyzi Celik, President and CEO of OnePIN, Inc. “As the largest mobile operator in the Russia with 71.5 million mobile subscribers, MTS services more than 32% of Russian mobile market. MTS an innovation leader, will be the first in Russia to offer CallerXchange, the world’s fastest growing mobile social address book solution. We look forward to seeing CallerXchange become a leading VAS service for MTS and throughout the Russian market.”

The CallerXchange service enables subscribers to share their contact information with friends, family, and colleagues to stay connected. The service also ensures that contact information in subscribers’ phonebooks is kept up to date, allowing users to keep in touch with people in their social networks even if their information changes over time.

About Mobile TeleSystems (MTS)
Mobile TeleSystems OJSC (MTS) [NYSE: MBT] is the leading telecommunications group in Russia, Eastern Europe and Central Asia, offering mobile and fixed voice, broadband, pay TV as well as content and entertainment services in one of the world’s fastest growing regions. Including its subsidiaries, as of December 31, 2010, the Group serviced over 108.1 million mobile subscribers in Russia, Ukraine, Uzbekistan, Turkmenistan, Armenia and Belarus. According to GSM Association Wireless Intelligence Information Service, MTS ranks as the 2nd largest operator in Europe by proportionate subscriptions at the end of 2010.

About OnePIN, Inc.
OnePIN is the world leader in social address book solutions for mobile operators. OnePIN’s technology transforms mobile phonebooks into social address books, improving customer retention while increasing voice and data revenue for mobile operators. OnePIN’s CallerXchange is a person-to-person contact exchange service that connects people and enhances social networks. With one click, using any mobile phone, CallerXchange enables subscribers to leverage their mobile social address books as the hub for their social networking. CallerXchange is currently being deployed to over 130 million mobile subscribers across all handset models within the world’s largest mobile operator groups. OnePIN is headquartered in Boston with offices around the globe.

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