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"it's like having a four foot antenna on your phone."
Anybody who knows anything about radio or wave physics knows this is silly. My physics is rusty, so anybody who catches me in a mistake here, please correct me.
An antenna is the length it is for a reason--it's meant to match the wavelength of the frequency it's tuned for, or some round fraction of that length (1/2 or 1/4, say). The frequency that CDMA and GSM phones operate on has a wavelength in the four to six inch range--not coincidentally, the length of your cell phone's antenna. So a four foot antenna really wouldn't help things.
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