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install two types of applications and software to your
applications based on Java
the extension .jad or .jar (
Other applications and software suitable for the
Symbian operating system (
have the .sis extension. Only install software
specifically designed for your Nokia N81. Software
providers will often refer to the official model number
of this product: the Nokia N81-1.
Installation files may be transferred to your device from a
compatible computer, downloaded during browsing, or
sent to you in a multimedia message, as an e-mail
attachment, or using Bluetooth connectivity. You can use
Nokia Application Installer in Nokia Nseries PC Suite to
install an application to your device.
, and select
mgr.. You can
). The installation files
Install applications and software
indicates a .sis application,
that the application is not fully installed, and
application is installed in the mass memory.
Important: Only install and use applications and
other software from trusted sources, such as applications
that are Symbian Signed or have passed the Java Verified
Before installation, note the following:
To view the application type, version number, and the
supplier or manufacturer of the application, select
To display the security certificate details of the
application, in Certificates, select
'Certificate management', p. 116.
If you install a file that contains an update or repair to
an existing application, you can only restore the
original application if you have the original installation
file or a full back-up copy of the removed software
package. To restore the original application, remove the
application, and install the application again from the
original installation file or the back-up copy.
The .jar file is required for installing Java applications.
If it is missing, the device may ask you to download it.
If there is no access point defined for the application,
you are asked to select one. When you are downloading
a Java application,