why do I have bad interference with my bluetooth and Iphone? Obnoxious noise on 2006 Lexus RX330

I have upgraded the phone several times and there seems to be poor connectivity between existing bluetooth in 2006 lexus and the newer technology. Very often I get this obnoxious noise when I try to use my newer technology cell phone through the 2006 bluetooth that came with the car? Is there an upgrade or remedy for this? I have spoken to ATT, Apple and Lexus to no avail. HELP

Asked by for the 2006 Lexus RX330
1 answer
Could be a bad plug wire. I have a 99 Suburban and we had interference in our blue tooth and stereo. Ater replacing the plug wires the blue tooth and stereo worked fine. Worth a shot?