Opticon H-19B 2D Manual page 26

Chapter . Basic Operations
You can still receive calls and make emergency calls when the keypad is locked.
To unlock the device, tap the Unlock button on the Today screen first,
a screen as below will show. Press * to unlock the device, or tap the
Unlock button on the screen.
You can lock/unlock the device by
p r e s s i n g t h e F n k e y a n d Re c o r d
key, refer to chapter . for more
information.