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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. To only use the GSM network,
press
, and select
Tools
Phone
Network
>
>
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. Press
select
Tools
Settings
>
Personalisation
Display
>
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
, scroll to an application in the list, and press
C.
Pressing C does not close Music player. To close
Music player, select it from the list and
Exit.
Settings
>
>
Network mode
>
, and
General
>
>
and
Light time-
Options
>
Free memory
Many features of the device use memory to store
data. The device notifies you if the device memory
or the memory card memory (if available) is low.
To view how much memory different data types
consume, press
, and select
the desired memory, and
Memory.
To free device memory, transfer data to a
compatible memory card (if available) or to a
compatible PC.
To remove data you no longer need, use File
manager or go to the respective application. You
can remove the following:
Messages in the folders in Messaging and
●
retrieved e-mail messages from the mailbox
Saved web pages
●
Contact information
●
Calendar notes
●
Applications shown in Application manager that
●
you do not need
Installation files (.sis or .sisx) of applications you
●
have installed. Transfer the installation files to a
compatible PC.
Tools
File
mgr.,
>
Options
Details
>
>
21
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