I now have a tethering mode on my iphone so today I tethered my Nexus 7 to the iphone, paired it by Bluetooth to my car radio then used the Navigation program and believe when I say it works great!!!! It was so clear & I could understand every word it said. When I went off the route it quickly rerouted. I am really pleased with this setup. I have the cup holder which put the Nexus 7 at the right height & angle so I am not distracted from the setup. Just thought I would share. jimjoh