Samsung C3590 hard reset
Use this method to hard reset your Samsung GT-C3590 / C3595 / C3592 phone: Enter *2767*3855#. Warning! All your data including contacts, messages etc. will be lost! Copy all your necessary data/Contacts/Messages etc. to SIM or make backup to your PC before full reset! Take out SIM card before full reset.
When disposing of your device, back up all data and then reset your phone.
Go to Menu - Settings - Reset
This will reset the device.