If the network mode is set to dual mode in thenetwork settings, the device searches for theUMTS network. You can set the device to use onlythe GSM network. To use only the GSM network,select Menu > Settings and Connectivity >Network > Network mode > GSM.● The backlight of the display increases thedemand on battery power. In the displaysettings, you can change the length of the time-out period after which the backlight is switchedoff, and adjust the light sensor that observeslighting conditions and adjusts the displaybrightness. Select Menu > Settings andPhone > Display > Light time-out orBrightness.● Leaving applications running in the backgroundincreases the demand on battery power. To closethe applications you are not using, press andhold the menu key, select Options > Showopen apps., and go to the application bypressing the menu key repeatedly. Press and holdthe menu key, and select Exit.Free memoryTo view how much space is available for differentdata types, select Menu > Applications > Filemgr..Many features of the device use memory to storedata. The device notifies you if the memory indifferent memory locations is low.To free memory, transfer data to a compatiblememory card (if available) or to a compatiblecomputer.To remove data you no longer need, use Filemanager or open the respective application. Youcan remove the following:● Messages in the folders in Messaging andretrieved e-mail messages in the mailbox● Saved web pages● Contact information● Calendar notes● Applications shown in Application manager thatyou do not need● Installation files (.sis or .sisx) of applications youhave installed. Transfer the installation files to acompatible computer.● Images and video clips in Photos. Back up thefiles to a compatible computer.14 Find helpCyanCyan MagentaMagenta YellowYellow BlackBlackCyanCyan MagentaMagenta YellowYellow BlackBlack