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of the SIM card and is supported by UMTS mobile
phones.
● PIN2 code — This code (4 to 8 digits) is supplied
with some SIM cards, and is required to access
some functions in your device.
● Lock code (also known as security code) — The
lock code helps you to protect your device
against unauthorised use. You can create and
change the code, and set the device to request
the code. Keep the new code secret and in a safe
place separate from your device. If you forget the
code and your device is locked, your device will
require service and additional charges may
apply. For more information, contact a Nokia Care
point or your device dealer.
● Personal unblocking key (PUK) code and PUK2
code — These codes (8 digits) are required to
change a blocked PIN code or PIN2 code,
respectively. If the codes are not supplied with
the SIM card, contact the operator whose SIM
card is in your device.
● UPUK code — This code (8 digits) is required to
change a blocked UPIN code. If the code is not
supplied with the USIM card, contact the operator
whose USIM card is in your device.
Prolong battery life
Many features in your device increase the demand
on battery power and reduce the battery life time.
To save battery power, note the following:
● Features that use Bluetooth technology, or
allowing such features to run in the background
while using other features, increase the demand
on battery power. Turn Bluetooth technology off
when you do not need it.
● Features that use wireless LAN (WLAN), or
allowing such features to run in the background
while using other features, increase the demand
on battery power. WLAN on your Nokia device
switches off when you are not trying to connect,
not connected to an access point, or not scanning
for available networks. To further reduce battery
consumption, you can specify that your device
does not scan, or scans less often, for available
networks in the background.
See "Wireless
LAN", p. 43. When Scan for networks is set to
Never, the WLAN availability icon is not shown
in the standby mode. However, you can still
manually scan for available WLAN networks and
connect to WLAN networks as usual.
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