I was reading Brian Greene's the elegant universe when I came across the section talking about how two people Gracie and George are traveling past each other in empty space. To each other they are stationary and the other is moving, therefore to each other the other's clock is slower. Greene discusses setting the clock to 12:00 and passing each other and how in order to check clocks later even by cellualr communication the max speed is that of light so the time it would take to contact the other to ask the the time on their watch would more than compensate for the slowness of the clock. In fact i believe he said that if there was something that was instantanous it would mean the fall of the theory. Here is my question. As far as not being able to communicate instantly there may infact be a way I thought of from my physics class. If you seperate the electrons in an electron pair no matter how far the distance the pair still "sees" itself as being connect and when one is fliped the other instantly does. I believe the space program is working on this idea to create a phone that would be used on longer than mars missions. So my question is what would happen if they were called each other using a electron pair phone?