Two ways you can reboot are, turning phone off, and then opening the back, removing the battery and wait for about 20 seconds and putting it back. This is a hard reboot and ussually turns the wireless off, which would mean you have to after the phone awakens again go to the radio the tower icon, and turning it on. You can do a soft reboot (I would recommend this first since this will not turn the radio off) by pressing control (
), alt (
), delete (
) much like you do in a computer, all at the same time until you see the screen go black. Wait for it to awaken and you should be ready to go.