To turn the standby breathing light on or off, selectStandby br. light. When the standby breathing lightis turned on, the menu key lights up periodically.To turn the notification light on or off, selectNotification light. When the notification light isturned on, the menu key lights up for a period youdefine to notify of missed events, such as missed callsor unread messages.Application managerAbout Application managerSelect Menu > Settings and Application mgr..With Application manager, you can see the softwarepackages installed in your device. You can view detailsof installed applications, remove applications, anddefine installation settings.You can install the following types of applications andsoftware to your device:● JME applications based on Java™ technology withthe .jad or .jar file extensions● Other applications and software suitable for theSymbian operating system with the .sis or .sisx fileextensions● Widgets with the .wgz file extensionOnly install software that is compatible with yourdevice.Install applicationsYou can transfer installation files to your device from acompatible computer, download them duringbrowsing, or receive them in a multimedia message,as an e-mail attachment, or using other connectivitymethods, such as Bluetooth connectivity.You can use Nokia Application Installer in Nokia OviSuite to install an application to your device.Icons in Application Manager indicate the following:SIS or SISX applicationJava applicationwidgetsapplication installed in the memory cardapplication installed in the mass memoryImportant: Only install and use applicationsand other software from trusted sources, such asapplications that are Symbian Signed or have passedthe Java Verified™ testing.Before installation, note the following:● To view the application type, version number, andthe supplier or manufacturer of the application,select Options > View details.To view the security certificate details of theapplication, select Details: > Certificates: > View 143 Settings