a few foreign friends of mine had quite a bad experience last month. The buttons of the door phone systems were just stolen and my friends could not see who was ringing to their doors. It happened just in the centre of Moscow!!! I know that many expacts are renting apartments in Moscow and it's actually the landlords' headache to replace all this stuff. But you want to feel secured while opening the doors, don't you? So, in case you have the same experience and really feel at a loss where to go and whom to address to repair or replace this door system (intercome), feel free to contact me for installation. It's legal with all necessary documents, so you can reimburse the money after from your landlords. But you can be safe already now. And it's not so expensive!