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Nokia 640 - Security settings (Menu 4 3)

Nokia 640
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©2001 Nokia Mobile Phones. All rights reserved. 39
Display contrast (Menu 4 2 5)
You can adjust the phones display contrast with this menu.
1. Press Select to adjust the display contrast.
2. Use the and keys to either increase or decrease the
contrast.
3. Press OK to accept a suitable contrast level. After adjusting
the contrast, press to return to the previous menu level.
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:
In the
Settings menu, scroll with the or keys to Security
settings
and press Select.
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 or keys to scroll between
options
On/Off.
Change PIN code (Menu 4 3 2)
With this menu function you can change the PIN code.
1. In the
Security settings submenu, scroll with the or keys
to
Change PIN code and press Select.
2. Key in the current code and press OK.
3. Key in the new code and press OK.

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