The screen just dimmed with nothing appearing on the screen. I thought it might have been the wrong charger, but after a few tries of different samsung compatible chargers, time only made the difference. So, I charge the phone when the screen goes dark for about a couple.of hours. Then remove the charger and let stand. In about 3 hours the phone will renew and it will perform like brand new. I m only able to use this until it's down about 47% then it'll repeat itself. Since I couldn't get a replacement phone from my provider, the on and off thing is the only way I can gave a phone. I can't afford.to pay for another one since I'm already making payments on this one for 24 months as it is.