I have a new Evo and whenever I disconnect a bluetooth headset or speaker the phone shuts down and reboots. I have tried every option I can think of. I hit the bluetooth widget, reboot. I go into settings and disconnect the device, reboot. I just shut off the power to the device, reboot. I am using blueant Q2 and S4 along with a jawbone prime and even my old motorola's, all the same results. Help before something flies out the window. Found the problem, the vlingo app had a bug that caused the rebooting. Uninstalled and the problem went away. Reinstalled and it has not come back yet.