MTT is a public large Russian telecommunication provider with 18+ billion revenue. As part of their expanding strategy they increase their investments in software developments and delivering additional services on top of their infrastructure. Working on a high competitive market is demanding though and despite all MTT efforts they failed to keep the fast pace of delivering new features to their new product called YouMagic. Another problem was a cross-platform support. YouMagic is a VoIP client similar to Skype, but with support of additional business features. We helped MTT to address both problems. Our cross-platform expertise was crucial for MTT and allowed to release basic mobile versions of YouMagic for iOS and Android within 3 months. We have been closely working with MTT on adding additional features to YouMagic and other products for 3 years.