February 2012

21.02.2012
Invitation: Fourth Quarter and Full Year 2011 Financial and Operating Results

The management of Mobile TeleSystems (MTS) will be holding a conference call to discuss the Company’s Fourth Quarter and Full Year 2011 Financial and Operating Results on March 12, 2012.

16.02.2012
Ad Hoc Notice

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces that on February 9, 2012, MTS received a Request for Arbitration from Mobile TeleSystems Finance SA (“MTS Finance”), wholly owned subsidiary of MTS, which has initiated an arbitration process under a loan agreement ("Loan Agreement") between the parties dated January 28, 2005. Under the terms of the Loan Agreement, MTSF lent $400 million to MTS. MTS Finance seeks the payment of all sums due to it under the Loan Agreement. MTS agrees that arbitration is the correct forum for any dispute between the parties but strongly denies that any sum is still owed by it to MTS Finance.

02.02.2012
MTS Awarded LTE License

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces that it has been awarded the first license in Russia to provide wireless communication services in the LTE standard in Moscow and the Moscow region.

Contact investor relations:

+ 7 495 223 20 25 ir@mts.ru

MTS Investor Relations
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