If it's connected via bluetooth, cell phone make doesn't matter, it will echo eventually. Call the service advisor while driving, after 5-10 minutes it will start echoing on him. We have found if your not driving (moving) it may not echo, which maybe what the dealers are doing that can't duplicate the issue. See work around above, provide your dealer with the Ford Case # CAS-28911596-V6L1C7 that all service personnel can see in Ford's OASIS tracking system. We have Not duplicate with Apple CarPlay which does Not use bluetooth.