When I select Sync voice and ask for services 40% of the time it will not connect. It just goes back to the song on the media player I am using at that time. I live in a area where there is no trees so reception should not be a problem. I tried repairing my phone, master reset, factory defaults and disconnecting the battery for 30 minutes to allow Sync time to reboot after reconnecting the battery. Nothing works, does my Sync need replacing or what?