MERRILL CORPORATION LPALLES//18-APR-13 11:34 DISK135:[12ZDM1.12ZDM79201]BA79201A.;7 mrll_1111.fmt Free: 42DM/0D Foot: 0D/ 0D VJ Seq: 1 Clr: 0 DISK024:[PAGER.PSTYLES]UNIVERSAL.BST;102 3 C Cs: 2075 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 Form 20-F អ Registration Statement pursuant to Section 12(b) or (g) of the Securities Exchange Act of 1934 or ፤ Annual report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the fiscal year ended December 31, 2012 or អ Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 or អ Shell company report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of event requiring this shell company report Commission file number 333-12032 15JUN201106100788 MOBILE TELESYSTEMS OJSC (Exact name of Registrant as specified in its charter) Not Applicable (Translation of Registrant’s name into English) RUSSIAN FEDERATION (Jurisdiction of incorporation or organization) 4 Marksistskaya Street, Moscow 109147 Russian Federation (Address of Principal Executive Offices) Joshua B. Tulgan Director, Investor Relations Mobile TeleSystems OJSC 5 Vorontsovskaya Street, bldg. 2, 109147 Moscow Russian Federation Phone: +7 495 223 20 25, Fax: +7 495 911 65 67 E-mail:
[email protected] (Name, Telephone, E-mail and/or Facsimile number and Address of Company Contact Person) Securities registered or to be registered pursuant to Section 12(b) of the Act: Title of Each Class Name of Each Exchange on which Registered AMERICAN DEPOSITARY SHARES,