Why don't the manufacturers of the cell phones give the electrical characteristics, frequency responce of audio, sensitivy in micro-volts to the signal. You can give me a smart phone that does everything imaginable if the signal drops out when I should have one, what is the advantage of all of the goodies? I ask but have never received any specs. I live in a fringe area of T-mobile, but I am told that I should purchase the high end unit because it will be a better phone, all I want is for them to prove it by showing me the electrical characteristics.