By Ben Aris in Berlin Russia’s biggest mobile phone operator MTS is offering its international investors whose shares have been blocked inside the country due to sanctions-related restrictions imposed in 2022 an opportunity to sell their shares at a discount and get a return on their investment, the company said in an emailed statement to bne IntelliNews on April 30. MTS is following in the footsteps of the country’s largest supermarket chain, Magnit, which completed a series of successful buybacks from foreign shareholders in 2023. MTS said on April 27 that its wholly owned subsidiary Steam D…