**Exhibit 4.27**

 

*FederalSupervisory Service for Communications*

 

**AddendumNo. 2**

 

**toLicense No. 29525  (Account Series A030443)****datedDecember 30, 2003**

 

“The conditions for the performance of activities in accordance withLicense No. 29525” shall be revised to read as follows:

 

1.             Mobile TeleSystems OJSC (the Licensee) shall beobliged to keep the term of this License.

 

2.             The Licensee shall be obliged to commence theprovision of communication services under this License no later than on June30, 2005.

 

3.             The Licensee shall be obliged to provide mobileradiophone communication services (GSM 900/1800 networks) in accordance withthis License in the territory of the Stavropol Krai.

 

4.             In accordance with this License, the Licenseeshall be obliged to ensure provisioning a subscriber with*:

 
| a) |   | access to the network of the Licensee;                                                                                                                                                                                                                                              |
|----|--------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| b) |   | connections on the Licensee’s mobile  radiophone communication network for receiving (transferring) voice and  non-voice information ensuring the communication continuity while rendering  services, irrespective of location of the subscriber, including while his  moving; |
| c) |   | connections with subscribers and (or) users  of fixed public-switched telephone networks;                                                                                                                                                                                           |
| d) |   | possibility of using GSM 900/1800 mobile  radiophone communication network while being outside the territory specified  in the License;                                                                                                                                             |
| e) |   | access to telematic communication services  and data transmission services, except for data transmission for the purpose  of voice data transfer;                                                                                                                                   |
| f) |   | access to the information and directory-inquiry  service;                                                                                                                                                                                                                           |
| g) |   | possibility of making free twenty-four-hour  calls to emergency services.                                                                                                                                                                                                           |

 

5.             The Licensee shall be obliged to rendercommunication services in accordance with rules of rendering communicationservices approved by the Government of the Russian Federation.

 

6.             At rendering communication services, the Licenseeshall be obliged to observe the rules of connection and interaction ofelectrical communication networks, approved by the Government of the RussianFederation, when connecting the Licensee’s mobile radiophone communicationnetwork to the public-switched network, connecting the Licensee’s mobileradiophone communication network to other communication networks, accountingand transferring the traffic in the Licensee’s mobile radiophone communicationnetwork,

 

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accounting and transferring the traffic from/to the communicationnetworks of other operators.

 

7.             This Licensee has been issued based on resultsof considering the application for granting a license without tendering (auction,competition). The license requirements for the Licensee’s discharge ofobligations undertaken by the Licensee when participating in tenders (auction,competition) to obtain respective license have not been established.

 

8.             The Licensee shall, in the period of renderingthe services under this License, adhere to the terms and conditions as set atthe moment of frequencies allocation and radio frequency or radio frequencychannel assignment.

 

9.             The Licensee shall have available thecommunications network management system that conforms to the standards appliedto communications network management systems, as prescribed by the FederalExecutive Body acting in telecommunications.

 

10.           The Licensee, when conducting operational-investigative activities, shallbe obliged to adhere to the requirements to networks and means ofcommunication, as prescribed by the Federal Executive Body and approved by theauthorized state bodies, and to take measures to prevent the disclosure oforganizational or tactical techniques of conducting of the above.

 

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*Rendering the services under this License can entail rendering otherservices, which are technically integrated into mobile radiophone services andare aimed at improvement of their customer value, provided no additionallicense is required for this purpose.

 

 
| **Deputy Manager,**                                |   |             |
|----------------------------------------------------|--------|------------------|
| **Federal Supervisory Service for Communications** |   |             | **S. A. Malyanov** |
|                                               |   |             |
|                                               |   |             |
|                                               |   | February 9, 2007 |

 

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