Bedienungsanleitung Nokia 5800 Xpressmusic (Seite 20 von 114) (Englisch)

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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 lifetime. 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.

● If you have set Packet data connection to When

available in connection settings, and there is no packet

data coverage (GPRS), the device periodically tries to

establish a packet data connection. To prolong the

operating time of your device, select Packet data

connection > When needed.

● The Maps application downloads new map information

when you move to new areas on the map, which increases

the demand on battery power. You can prevent the

automatic download of new maps.

● If the signal strength of the cellular network varies much

in your area, your device must scan for the available

network repeatedly. This increases the demand on battery

power.

If the network mode is set to dual mode in the network

settings, the device searches for the UMTS network. You

can set the device to use only the GSM network. To only

use the GSM network, select Menu > Settings and

Connectivity > Network > Network mode > GSM.

● The backlight of the display increases the demand on

battery power. In the display settings, you can change the

time-out after which the backlight is switched off, and

adjust the light sensor that observes lighting conditions

and adjusts the display brightness. Select Menu >

Settings and Phone > Display > Light time-out or

Light sensor.

● Leaving applications running in the background increases

the demand on battery power. To close the applications

you do not use, press and hold the menu key, select

Options > Show open apps., and navigate to the

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