I use the front cup holder for my phone and the only problem I have had is short lived noises as the phone connects and dials the number, almost like listening to an incoming fax, but once the call is connected I lose it. Can you hear the interference, or is it at the other end someone has told you, it could just be the very poor setup of the
HFT and the background noise and front air vents on the mic. That reminds me, time for another email to Honda re that, 6 weeks since they acknowledged my email. I have not forgot!