select Menu > Tools > Settings and Phone >
Network > Network mode > GSM.
● The backlight of the display increases the
demand on battery power. In the display
settings, you can change the length of the time-
out period after which the backlight is switched
off, and adjust the light sensor that observes
lighting conditions and adjusts the display
brightness. Select Menu > Tools > Settings
and General > Personalisation > Display and
Light time-out or Brightness.
● Leaving applications running in the background
increases the demand on battery power. To close
the applications you are not using, press and
hold the menu key, scroll to the application, and
press C.
● To save power, activate the power save mode.
Press the power key, and select Activate power
saving. To deactivate it, press the power key,
and select Deactivate power saving. You may
not be able to change the settings of certain
applications when the power save mode is
turned on.
Free memory
To view how much memory is available for different
data types, select Menu > Applications >
Office > File mgr..
Many features of the device use memory to store
data. The device notifies you if available memory is
low.
To free memory, transfer data to an alternative
memory (if available) or compatible computer.
To remove data you no longer need, use File
manager or 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 (with .sis or .sisx file extensions)
of installed applications. Back up the installation
files to a compatible computer.
● Images and video clips in Photos.
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