RE: CELL TOWERS AND RADIOS
Radio interference is strange stuff.
It doesn't necessarily have to get in via the aerial. With a bit of BF&I it can get into any metal component, and if there is a semiconductor there, it can be resolved into a signal, much like the old cats whisker crystal sets. This then gets amplified by the rest of the circuit. In cases like that, it doesn't matter whether its AM, FM, gazillions of gigahertz or wired direct.
Being at the base of a cell tower would probably put you in an area of minimal signal strength - further out, it depends on the height of the tower and the design of the antenna and the power being transmitted.