Rostelecom shareholders approved plans to spin-off its mobile assets in January this year, and the company has since transferred all of its shares in mobile subsidiary, RT-Mobile, to the joint venture.
It has also had its licences reissued to the new entity, where it will have a 45% stake.
State-controlled bank VTB bought Tele2 Russia from Tele2 in April 2013 and later agreed to sell 50% of Tele2 Russia to a group of investors.
VTB will hold a 55% stake in the joint venture.
