How are you accessing the lock option? the screen icon? keypad shortcut? Do you have it set as one of your customizable "hot keys" on either side of the device?
__________________ 1st Step in Troubleshooting: Do you have a BlackBerry Data Plan? 2nd Step in Troubleshooting: Pull the Battery.
How are you accessing the lock option? the screen icon? keypad shortcut? Do you have it set as one of your customizable "hot keys" on either side of the device?