RCT can be done over the phone and be just as effective as in person. This is true because, according to quantum physics, space and time are not the limiting factors they appear to be—scientists have found, for example, that an atomic particle that is miles apart from a second, related particle reacts identically and instantly when the other particle is stimulated.
Think about it: when you talk to someone on the phone, you are immediately connected to them and can impact them on multiple levels even though you are miles apart. RCT does this on an energetic level.