i need help with this also im new to this forum .....i have the f90bt and it just keeps turning off when i start driving.....as long as i am not moving it works fine but as soon as i start to drive it reboots every few minutes or so VERY IRRATATING CAN U GUYS HELP ME,,,IVE HAD THIS UNIT FOR A FEW YEARS BUT TOOK IT OUT WHEN IT STARTED DOING THIS NOW I AM TRYING TO RESOLVE THE ISSUE and start enjoying this expensive unit that i purchased