Sony Ericsson P900 Benutzerhandbuch

Developers Guideline 

26

October 2004

“Symbian Signed” is a new program from Symbian that supports tested and digitally signed applica-
tions on Symbian OS phones. It is supported by all Symbian licensees including Sony Ericsson.

A “signed” application means that the application has passed the test criteria and is digitally signed to 
guarantee the source and integrity of the application. Sony Ericsson encourages all users to use 
signed applications only.

 

 
Developers are allowed to use a Symbian logo called “For Symbian OS” to indicate compliance to the pro-
gram. For further information see the 

In order to install an application that is “Symbian Signed”, a Symbian root certificate must be present in 
your phone. This certificate is pre installed in the P900 and P910 series mobile phones but needs to be 
installed in the P800 series mobile phones by following the installation steps in the section below: “How to 
install the Symbian certificate

•

Go  to  Applications -> Control Panel -> Certificate manager -> Certificate Authority. The list 
contains a certificate called “Symbian”.

•

If the Symbian certificate is not there you will need to install it.

•

You must have the “Sony Ericsson” certificate in the list. If you do not see the “Sony Ericsson” cer-
tificate you must contact Sony Ericsson customer support. 

 
All future Symbian OS based phones will have a preinstalled Symbian root certificate from the factory. If 
you have accidentally erased it from your phone it is possible to use the same procedure as for the P800 
series.

1. Download the Certificate Installation Application (CIA) to your PC. The CIA is available from the follow-

ing sites:

•

Sony Ericsson’s support web site at 

•

Sony Ericsson Developer World at 

http://www.sonyericsson.com/developer

•

Sony Ericsson Application Shop at 

•

Symbian Signed web site at 

2. Install the file

 Certificate_installation.sis to your phone through the PC suite in the same way as for all 

downloadable applications

 (the format of the application is a normal Symbian OS installation file).

3.  After successful installation, the application called "Certificate installation" appears in the application 

list. (Scroll down if necessary).