Samsung Gravity SMART hard reset
Note: All data will be lost!
Press and hold the Power key and the T key on the QWERTY keyboard until you see Android system recovery screen.
Press Volume DOWN key to select wipe data / factory reset and then the Power key to select.
Press the Volume down to select Yes - Wipe user data.
Press the Power key.
Press the Volume down to scroll to Reboot system now.
Press the Power key again.
Use this method to hard reset your Samsung Gravity SMART Android 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.