OBS_VALUE: Mobile communication operators are not regulated as SMP unless they voluntarily file an application with the regulating authority to be considered as such and prove that they meet relevant criteria. Mobile segment is dominated by four operators: Megafon, Vympelkom, Tele2 and MTC. However, as on 2022, register of operators having significant market power in the field of communications does not contain mobile operators: http://rkn.gov.ru/communication/register/p197/. Only the list of essential terms to be included into the interconnection agreement is mandatory for mobile operators, while the prices for the provided services are not regulated.