power. You can prevent the automaticdownload of new maps.• If the signal strength of the cellularnetwork varies much in your area,your device must scan for theavailable network repeatedly. Thisincreases the demand on batterypower.If the network mode is set to dualmode in the network settings, thedevice searches for the 3G network.You can set the device to use only theGSM network. To use only the GSMnetwork, select Menu > Settings andConnectivity > Network >Network mode > GSM.• The backlight of the display increasesthe demand on battery power. In thedisplay settings, you can change thelength of the time-out period afterwhich the backlight is switched off.Select Menu > Settings andPhone > Display > Light time-out.To adjust the light sensor thatobserves lighting conditions andadjusts the display brightness, in thedisplay settings, select Light sensor.• Leaving applications running in thebackground may increase thedemand on battery power. To closethe applications you are not using, ifthey are not responding, selectOptions > Show open apps., and goto the application using the menu key.Press and hold the menu key to openthe application, and select Options >Exit.Increase available memoryDo you need more available devicememory for new applications andcontent?View how much space is available fordifferent data typesSelect Menu > Applications > Office >File mgr..Many features of the device use memoryto store data. The device notifies you if thememory in different memory locations islow.Increase available memoryTransfer data to a compatible memorycard (if available) or to a compatiblecomputer.To remove data you no longer need, useFile manager or open the respectiveapplication. You can remove thefollowing:• Messages in the folders in Messagingand retrieved e-mail messages in themailbox• Saved web pages• Contact information• Calendar notes• Applications shown in Applicationmanager that you do not need• Installation files (.sis or .sisx) ofapplications you have installed.Transfer the installation files to acompatible computer.• Images and video clips in Photos. Backup the files to a compatible computer.© 2010 Nokia. All rights reserved.10