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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. If it is not available, the device
uses the available GSM network. To only use the
GSM network, press
, and select Tools >
Settings > Phone > Network > Network
mode > GSM.
● The backlight of the display increases the
demand on battery power. To change the time-
out after which the backlight is switched off,
press , and select Tools > Settings >
General > Personalisation > Display >
Light time-out. To adjust the light sensor that
observes the lighting conditions and adjusts the
brightness of the display, in the display settings,
select 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 Options >
Exit.
Free memory
Many features of the device use memory to store
data. The device notifies you if the device memory
is low.
To view the types of data you have in the device and
how much memory the different data types
consume, press
, and select Tools > File mgr. >
Options > Memory details. The amount of
available memory is shown in Free memory.
To free device memory, transfer data to a
compatible PC.
To remove data to free memory, use File manager
to delete files you no longer need, 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 to your device. Back up the
installation files to a compatible PC using Nokia
Nseries PC Suite.
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Useful information