fixed telephony market through its subsidiary Moscow City Telephone Network (MGTS). In November 2013, the company has launched the "Home phone MTS" in Ryazan, Oryol, Kirov, Krasnodar, Rostov-on-Don and Yekaterinburg. The subscription fee for the wired telephone is 100 rubles. Per month, it includes unlimited calls to numbers of local fixed-line operators. The cost of calls to mobile numbers range from 1.1 rubles per minute depending on the region. Prior to that, in several cities such services are also provided by Comstar, a subsidiary of MTS. During 2012–2013, MTS deployed FTTB network in nearly twenty new cities of the Far East, Siberia, Central, Volga and Ural federal districts. In 2012, MTS launched in all the cities where the DTV signal standard DVB-C, and in December 2013 a project to provide fixed telephony services to the mass market in the regions. In 2013, Interregional TransitTelekom won a tender held by MTS to provide IPX services, and became one of the service providers for the company in the international telecommunications market. In November 2013 MTS began offering their Russian customers LTE roaming service, after such agreement were signed first with South Korean operator SK Telecom and then with Saudi Arabia and Great Britain. Along with the construction of the fixed network, the company launched in 2013 DVB-C digital television standard in Ulan-Ude, Blagoveshchensk, Ussuriisk and Nakhodka. In November 2013 MTS completely switched to digital TV by connecting new subscribers, ending the connection to analogue television. On September 17, 2019, it was revealed that a storage device containing 1.7 terabytes of information related to MTS was exposed to the public internet in a data leak. VivaCell-MTS Armenia In Armenia, services under the MTS brand are provided by K-Telecom CJSC, under the brand name "", 80% of which are owned by MTS OJSC. The number of subscribers of VivaCell-MTS in Armenia as of 31 March 2011 was 2.55 million. As of May 2011, VivaCell-MTS occupied more than 60% of the mobile market in Armenia, and as of December 2017 VivaCell-MTS had 2.1 million subscribers. MTS Belarus In Belarus, the MTS trademark renders services of cellular communication and data transmission of "Mobile TeleSystems JLLC". The founders of this company are Beltelecom (51% of shares) and The Russian Mobile TeleSystems OJSC (49% of shares). As of December 2017, MTS had 5.2 million subscribers in Belarus. Former operations MTS Turkmenistan On 25 July 2012, MTS signed an