Almost any phone can be used to make conference calls. What is more important is that you have arranged to make conference calls possible with your telephone or internet service provider. Virtually any phone can be a Conference Call Phone. Take three-way calling for instance. All that one has to do is to dial the first number and then dial second number after pressing the flash key in order to make this kind of call. For more participants, some sort of PIN is used in order to gain access to a dedicated line. For this purpose, any modern phone will do.