First method:

  1. The device must be turned off, so hold down the Power rocker for a while.Hard Reset CATERPILLAR S40
  2. Afterwards press and hold the Volume Up button for a few seconds.Remove Screen Lock CATERPILLAR S40
  3. While still holding the Volume Up connect your device to PC or charger by using Micro USB cabel.
  4. You can release held key as soon as the Recovery Mode appears on the screen.
  5. In the next step use Volume buttons to select "wipe data/factory reset" and tap the Power button to confirm.HardReset CATERPILLAR S40
  6. Afterwards choose "yes" from the menu, and accept it with Power button.Hard Reset CATERPILLAR S40
  7. After a while accept option "reboot system now" using Power rocker.Permanently delete data from CATERPILLAR S40
  8. That's all. The hard reset operation should be completed.

Second method:

  1. At the very beginning hold down the Power key for a short while in order to switch off the device.Hard Reset CATERPILLAR S40
  2. In the next step go to Settings and select Backup & Reset.HardReset CATERPILLAR S40
  3. Then tap Factory Data Reset and Reset Phone. Factory Reset CATERPILLAR S40
  4. After that, choose Erase Everything if you are sure you want to clear all your data. 
  5. Finally, select OK to confirm the whole operation.
  6. Congratulations! Your phone is ready to use.

Hard Reset CATERPILLAR S40 - remove screen lock protection

Hard Reset CATERPILLAR S40 - wipe device by factory reset

Hard Reset will erase all of your data
All described operations you are doing at your own risk.

Help! This doesn't work