I want to delete the memory on my samsung sph-m300 so I can sell it. Any clues?

Select Menu > Settings > Security.
2. Enter your lock code. (The Security menu is displayed.)
3. Select Reset Phone and press .
4. Select Yes and press .
5. You will be asked to confirm resetting the phone. If you
are then sure you want all data erased and the phone
reset to its factory default state, select Yes and press

Reset settings..it will erase all the memory