Here is a cable that has special wiring inside to activate the Car Dock app in a HTC phone. This is a good alternative for those who are not using the Sprint dock. I plan on buying this cable but question if it has the D+ and D- pins shorted as other high current chargers. Here is a link to the cable:
http://shop.htcpedia.com/htc-evo-4g-lte-car-dock-mode-usb-cable.html
The site states that this cable is compatible with the HTC EVO 4G LTE. This cable will not work if you plug it into a car dock instead of going straight into the phone.
http://shop.htcpedia.com/htc-evo-4g-lte-car-dock-mode-usb-cable.html
The site states that this cable is compatible with the HTC EVO 4G LTE. This cable will not work if you plug it into a car dock instead of going straight into the phone.