Can anyone help me get the Samsung U410 to reboot. Bought new at Christmas and been very careful with. was just sitting on desk today when I checked at lunch the screen was blank. Tried powering down and rebooting/ removing battery, but it will not recover. Any suggestions are welcome. (p.s. can still make calls, tried to call it repeatedly and only 3rd and 5th calls actually rang - others went to v-mail straight away). Thanks, b2b_anjl