Nokia X5-01 - Manual (Page 103)

are not supplied with the SIM card,
contact the network service provider
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 network service
provider whose USIM card is in your
device.
International Mobile Equipment
Identity (IMEI) number — This number
(15 or 17 digits) is used to identify valid
devices on the GSM network. Devices
that are, for example, stolen, can be
blocked from accessing the network.
The IMEI number for your device can be
found under the battery.
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.
Deactivate Bluetooth technology
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 deactivates 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 Menu > Ctrl. panel >
Settings and Connection
>
Packet data > Packet data
connection > When needed .
• 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.
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