Cell phones have a weak electromagnetic field in the frequency range of Microwave. Land Telephone line use means, which confine your movement somewhat, as you have to be connected to the system on the ground or in a location, which has phone lines. Even the walk-around phones in the house have limited range.
Satellite communication systems are often expensive to use and you generally need a clear shot of the satellite. Since we know that the brain runs on frequencies and the these frequencies are in the ELF range, if we can match the two people’s bodies who will be communicating with each other with the same intake of food, amount of sleep and similar genetics and then power their brains up with external sources of energy and tune them to the same frequencies, we should be able to get some thought transfer going.
By keeping the frequencies closest to the human brains normal levels, rather than the microwave levels we will have a much better advantage in seeing such a research project yield the desired results rather than none at all.
Additionally current scientists working in this field in my opinion do not have an open enough mind to believe in what they are doing enough to take the work seriously and therefore may not achieve the results we need to take this research to the next step for human mind-to-mind communication and eventually visualization and complete thought transfer.