Poti formata telefonul dar o sa pierzi tot din el.
1.Press together volume up + volume down +home button + power button
2.Release your fingers of the phone when Samsung logo appear
3.Choose with volume buutons "wipe data/factory reset"
4.Select with home button
5.Choose "yes" with volume button
6. Wait until format is complete
7.Select "reboot"
http://www.youtube.com/watch?v=dfWr8yjQofs