Use android phone as bluetooth receiver in car In my car I have my old Android phone as the GPS and music player. I was hoping to use it as a receiver for my calls coming to my other phone and any bluetooth devices around it streaming music. Is there a way to do this? I have searched Google thouroughly.
Technically it is possible with most Bluetooth Android phones  but you would have to root your device and find a ROM  with source code  like CyanogenMod and rewrite the Bluetooth driver.