You do not should enter a phone number or email to work with a colleague, and you can enter This system just by specifying a name and talk to anyone you like.???? ?? ?? ?? ?? ?? ????? ???? ??? ?????? ??? ?? ???? ??????? ??????? ???? ?? ??????? ??????? ??????.??? ???? ???? ??????? ?? ?? ?? ?? ?? ??? ????? ???? ????!?? ?????? ?????? ?? ????? ??? ????