See "Certificate manager," p. 87.If you install applications that require a networkconnection, note that the power consumption of yourdevice may increase when you use these applications.Installing Symbian softwareWhen you install an update or repair to an application,you must have the original or a full backup to restore theapplication. To restore the original application, removethe application, and install it again from the originalinstallation file or the backup copy.To install software, search the device memory or memorycard for the installation file, select the file, and press theenter key to start the installation. For example, if youreceived the installation file as an e-mail attachment, goto your mailbox, open the e-mail, select an installationfile, and press the enter key to start the installation.Use the Application manager to remove software. See"Application manager," p. 79.Installing Java™ applicationsWhen you install a signed Java application, the coverphone must be switched on and you must have a validSIM card inserted.2. Confirm the installation. The .JAR file extension isrequired for installation. If it is missing, the device mayask you to download it. If there is no access pointdefined, you will be asked to select one. When youdownload the .JAR file, you may need to enter a username and password to access the server. You canobtain these from the application provider.3. The device informs you when installation is complete.Tip: When browsing Web pages, you candownload an installation file and install itimmediately. Note, however, that the connectionruns in the background during installation.JavaYou can install and run Java applications on yourdevice. See "Installing applications and software," p. 103.The Java platform for the Nokia 9300i is J2ME. You cansearch for Java applications with the browser, downloadthrough the Internet, and store them in the Applicationsfolder.To manage your Java applications, use the Applicationmanager.J2ME on your device supports two Java environments:MIDP and Personal Profile.Data and software managementC:/USERS/MODEServer/zmao/3934007/ra-8_minime/en/issue_1/ra-8_minime_en_1.xml Page 104 Sep 27, 2005 12:15:2C:/USERS/MODEServer/zmao/3934007/ra-8_minime/en/issue_1/ra-8_minime_en_1.xml Page 104 Sep 27, 2005 12:15:2