The power of the electromagnetic field radiated by any source attenuates with the inverse of the square of the distance. Since I suppose that the 3G electromagnetic field is radiated with a power less than 2 W (as every mobile phone at least here in Italy) I think that it shouldn't give any effect to human beings.
I have had issues with cell phones, particularly the early ones and headaches. I am also sensitive to very high pitched sounds. I have not noticed any issues whatsoever with driving the model S. ... my neck gets a little sore, but that's from punching the "gas", ;~).
I can hear high pitched sounds well above what most people can, so I feel your pain on that front. I used to hate it when stores had cheap tube TV anti-theft monitors, because the screams of their horizontal flyback transformers were like nails on chalkboard to me. Fortunately no one uses those things anymore.
I wouldn't be surprised if the early phones were making some high pitched noise.