This may need to go to ROOT section.. I am rooted Mikg sense 3.0 chopsuey set cpu installed and overclocked to 1075200 OK... 1 during charge using cigarette lighter plug my Navigation will screen off back to my home screen where my icon is located, however, Navigation is still running in background. Audio turn by turn still working and program shown in navigation bar. 2. Used Car Home (car panel) and same thing. Screen goes off and back to home scree with car panel icon. Contacts will also open then close. Navigation will run for 4 - 6 minutes on charge. I've changed chargers. 1 is sprint cable, the other is sprint usb with aftermarket lighter adapter. no problem off charger. I'm also running setcpu and tried changing some settings. Doesnt seem to matter.