Warning: If you install a software update, youcannot use the device, even to make emergency calls,until the installation is completed and the device isrestarted. Be sure to back up data before acceptinginstallation of an update.Application managerWith 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 two types of applications and softwareto 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 fileextensionsOnly install software that is compatible with yourdevice.Install applicationsSelect Menu > Ctrl. panel > App. mgr..You 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 useNokia Application Installer in Nokia PC Suite to installan application to your device.Icons in Application manager indicate the following:SIS or SISX applicationJava applicationwidgetsImportant: 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 display the security certificate details of theapplication, select Details: > Certificates: > Viewdetails.• If you install a file that contains an update or repairto an existing application, you can only restore theoriginal application if you have the originalinstallation file or a full backup copy of the removedsoftware package. To restore the originalapplication, remove the application, and install theapplication again from the original installation fileor the backup copy.129 Security and data management
