General information • Applications and software specifically intended for theNokia 7710 or suitable for the Symbian operatingsystem. These installation files have the extension .SIS.See “Installing software” on page 28.• J2Micro Edition TM Java applications suitable for theSymbian operating system. These files have theextension .JAD or .JAR. Do not downloadPersonalJava TM applications to your smartphone asthey cannot be installed. See “Installing Java TMapplications” on page 28.Installation files may be transferred to your smartphonefrom a compatible computer, downloaded duringbrowsing, or sent to you in a multimedia message, as an e-mail attachment, or via Bluetooth.Important: Only install applications from sourcesthat offer adequate protection against harmfulsoftware.During installation, the smartphone checks the integrity ofthe package to be installed. The smartphone showsinformation about the checks being carried out, and youare given options whether to continue or cancel theinstallation.For information on digital signatures and certificates, seeInstalling softwareIf you install a file that contains an update or repair to anexisting application, you can only restore the originalapplication if you have the original installation file or afull back-up copy of the removed software package. Torestore the original application, first remove theapplication and then install the application again from theoriginal installation file or the back-up copy.To install software, search the smartphone memory orthe memory card for the installation file, and double-tap the file to start the installation. For example, if youhave received the installation file as an e-mailattachment, go to your mailbox, open the e-mail anddouble-tap an installation file to start the installation.To remove software, see “Application manager” onpage 109.Tip: For more information on software installations,see “Application manager” on page 109.Installing JavaTM applications1 Search the smartphone memory or the memory cardfor the installation file, select the file and double-tap
