Ukraine’s three mobile telephone companies are investing $20 million to start 4G service in parts of Kyiv’s subway system this spring, Kyivstar President Alexander Komarov tells reporters. Slowing work, installation can only take place when trains do not run through the tunnels, generally between 12:30 and 5:30 in the morning. The Kyiv City Council has yet to set tariffs for metro usage by the companies – Kyivstar, Vodafone Ukraine and lifecell.