First method:

  1. Begin by holding down the Power key in order to switch off the tablet.Hard Reset SUPERSONIC SC-90MID
  2. In the next step press and hold the Volume Up + Power button for a couple of seconds.HardReset SUPERSONIC SC-90MID
  3. You can release held keys when the Android Image appears on the screen.
  4. Then select "wipe data/factory reset" by using Volume Down to scroll and Power button to confirm.Factory Reset SUPERSONIC SC-90MID
  5. Select "Yes--delete all user data". Use Volume Down button to scroll and Power key to select.
  6. To restart the phone, select "reboot system now".Factory Reset SUPERSONIC SC-90MID
  7. Congratulations! The hard reset operation has been performed.

Second method:

  1. At the very beginning, power on the tablet.Hard Reset SUPERSONIC SC-90MID
  2. Then go to Settings and then to Backup & reset.Master Reset SUPERSONIC SC-90MID
  3. Tap Factory Data Reset and selec Reset Device
  4. Choose Erase Everything if you are 100 %sure you want to clear all your data. 
  5. Select OK to confirm the whole operation.
  6. Success!!

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

Help! This doesn't work