The old and wise people, long gone now, believed that teleportation and telepathy could be achieved with the mind. They said that if you wanted to go to a different place in an instant, all you had to do was WANT (and i mean really want!) to got to that place so much that if you closed your eyes and convinced your mind that you were at that place, then you would find yourself there.
It works the same way for telepathy too. You need to really WANT to talk to that person through all the distance and the barriers.
How all of this might work, I'm not really sure. But, I think it has something to do with Mind being over Matter.