If you have forgotten your screen lock code you need to reset the device to factory defaults. NB! Apps and data will be deleted!

Here is what you have to do:

  1. Shut the device off and make sure the charger cable is NOT connected to the device.
  2. Press and hold the power button and the + button simultaneously. After 3 seconds release the power button. When the display shows the text "no command" you can release the + button.
  3. Press and hold the power button again, while you short press the + button. The Android system recovery menu should now be visible. Release the power button as soon as the menu is visible. 
  4. Navigate to “wipe data / factory reset” by pushing the + and – volume buttons
  5. Choose “wipe data / factory reset" by pushing the power button
  6. Confirm by using the +, - and power buttons
  7. The device will reset and start with factory defaults.

PS: By having your device enrolled at https://www.collaboration-x.net you can easily remotely manage and reset passwords.