network. To only use the GSM network, select Menu > Settings andConnectivity > Network > Network mode > GSM.● The backlight of the display increases the demand on battery power. In thedisplay settings, you can change the time-out after which the backlight isswitched off, and adjust the light sensor that observes lighting conditions andadjusts the display brightness. Select Menu > Settings and Phone > Display >Light time-out or Light sensor.● Leaving applications running in the background increases the demand on batterypower. To close the applications you do not use, press and hold the menu key,select Options > Show open apps., and navigate to the application with themenu key. Press and hold the menu key, and select Exit.Free memoryTo view how much space is available for different data types, select Menu >Applications > File mgr..To remove data you no longer need, use File manager or go to the respectiveapplication. You can remove the following:● Messages in the folders in Messaging and retrieved e-mail messages from themailbox● 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 theinstallation files to a compatible computer.● Images and video clips in Gallery. Back up the files to a compatible computerusing Nokia PC Suite.© 2008 Nokia. All rights reserved.28