Display Contrast (Menu 4 2 5); Security Settings (Menu 4 3).39; Pin Code Request (Menu 4 3 1); Change Pin Code (Menu 4 3 2) - Nokia 640 User Manual

Display contrast (Menu 4 2 5)

You can adjust the phone's display contrast with this menu.
1. Press Select to adjust the display contrast.
2. Use the and
contrast.
3. Press OK to accept a suitable contrast level. After adjusting
the contrast, press
4. Or press to return to the previous menu level without
changing the contrast.
Security settings (Menu 4 3)
You can protect your phone against unauthorised use using the
functions within this submenu. To enter this submenu:
Settings
In the menu, scroll with the
settings
and press

PIN code request (Menu 4 3 1)

Note: The default PIN code is 0000.
With this menu function you can select whether the PIN code is
required when the phone is switched on.
Once you are in this menu, use the
On/Off
options .

Change PIN code (Menu 4 3 2)

With this menu function you can change the PIN code.
Security settings
1. In the
Change PIN code
to
2. Key in the current code and press
3. Key in the new code and press
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keys to either increase or decrease the
to return to the previous menu level.
Select.
or
submenu, scroll with the
and press
Security
or keys to
keys to scroll between
or
Select.
OK.
OK.
keys