Originally Posted by JayDevil

I resolved this problem, with :
1. Turn off the phone
2. Press and hold Home Button ( middle ) + power on for at least 10 seconds
3. Android System Recovery Mode Appear
4. There are 4 options

reboot system now
apply sdcard:update.zip
wipe data/factory reset
wipe cache partition

5. Move the options to " Wipe data / factory reset " using volume down ( - ) button and menu button to confirm, because the touchscreen doesn't work in reovery mode (Use the home to choose Yes)
6. After the process done, phone will reboot. (It if does not, Choose "reboot system now")

Thanks: matrix69