It is generally believed that 2000 saw a real boom in mobile communication. In late 1999 the number of subscribers did not exceed 1.4 million, but by late 2000 it had soared to 3.26 million, which constitutes a 180% increase. 180 mobile providers offered their services to 3263 million clients across Russia, runs the report of the Russian Ministry for Communications. GSM networks' growth accounted for the rapid increase. GSM providers launched a "purchasing" campaign, spending about $80 per new customer. In 2000 the number of subscribers increased by 287% and 130% for MTS and VympelCom respectively. The subscriber base of SMARTS JSC, which brought together 9 GSM operators in the Volga Region, included 91 thousand people. The growth rate of SMS traffic in Russia equalled the global growth rate. The first tests of WAP-technologies were carried out. In early 2000 MTT successfully completed the transition from terminal switches to tandem switching centres (TCS). Thus, Multiregional TransitTelecom created a system which was able to simultaneously process voice data and signalling data of various mobile standards. It, therefore, managed to bring together remote local networks to create a single infrastructure.

In 2000 13 GSM networks joined MTT's transit network. The overall number of providers connected through MTT fell just a short way of 80, with 37 GSM operators and 42 operators in NMT-450 standard, practically equal numbers. That very year MTT obtained new licenses to offer additional services to its partners: No. 13140 for data transmission services and No. 13205 for telematic services. MTT's traffic skyrocketed by 250% that year owing to a drastic change in MTT’s tariff policy. In March 2000 partners were offered new tariff plans, which resulted in rapid sustainable growth apparent since May. The overall number of subscribers indirectly using MTT services exceeded 2.5 million, which constitutes a 270% increase.

MTT's first website was launched on 31 October 2000 for convenience matters. It provided reference data for operators, technical requirements to connect to MTT’s transit network, the list of services, and a lot of useful tips and data for mobile providers.

In 2000 the development plan up to 2010 was prepared for Russian cellular mobile systems and approved by the Decision of the State Telecommunication Commission on 29 November 2000.

2000 revealed that Multiregional TransitTelecom could take pride in other matters as well as the provision of high-quality telecommunications services. In December 2000 Marina Miller, MTT’s Chief Accountant, won the Third All-Russian contest “Russia’s Best Accountant 2000” in the nomination “The best automation solution for accounting and administrative business”. The contest was part of the Second Annual “Kremlin Day of Russian Accountants and Financial Controllers”. The contest was held under the auspices of the State Duma and received support of federal departments and agencies, regional administrations and the Moscow Government. The triumph of MTT’s chief accountant was the official recognition of high-standard accounting in the company and professionalism of its personnel.