Acer F900 User Manual page 76

If your screen is responding to stylus
input: Go to Start > Programs > Utilities
> Default Settings. Read the warning
information and enter the security code
in the empty textbox. Tap OK to pro-
ceed.
If your screen is not responding to stylus
input: Press the reset button while hold-
ing the power button down. When you
see the Acer screen, press and hold the
Record button. You will see a screen
asking you to confirm the clean boot, press the camera button
to confirm. If you do not press the camera button, your smart-
phone will reboot to as normal.
76 Acer F900 Smartphone User Guide