My Samsung tablet smt580 was performing a little slower than I preferred so I thought it was time for a reboot. After closing out all windows I tried to reboot and got the window to enter my PIN to unlock so I could actually reboot my device. However, the keyboard will not appear. I've tried turning the device every which way and trying to swipe from the edges and corners, but no keyboard will appear. I tried plugging it into a charger to try and trigger something that might bring up a keyboard but that did not help. I also plugged in a SDcard attachment but again no keyboard. I let it sit over night but still the same results. My device is locked and I can't enter my PIN.-------The staff at Prey was prompt and attentive. Unfortunately their was no solution except to let my tablet device die without getting charged. When I later charged it and powered it back up I never had the problem again.