If you often getting the certificate error message when installing some applications on your Nokia Symbian phone, it means the applications is unsigned or haven’t been approved by Symbian foundation so you have to get the application signed before install it to your device. Actualy there are 2 ways to install unsigned application.

First way is hack your phone which i don’t recommend you to do that, and the second one is remove the ‘signed’ restriction by get a certificate dan key for your phone, and then sign each application individually (Recommended).

The best site to get certicate and key is cer.opda.cn, in this site you can request your certificates for free, just register for an account first and you’ll need to login then click the ‘Apply Cer’ button to submit your certificate request.

Fill the blank field with your detail (Phone model, IMEI) for moderation. Click image below to see the form.

Once you have submitted the request, you need to await 1 or 2 days until your certificate and key are ready. When your status is Normal it means your certificate is ready to use. There are 2 ways to sign the application after your cer & key are ready, you can download SignSISTool.zip to sign it offline in your PC, or you can click ‘signing’ link to sign it online. See image below (click to enlarge)

Please refer this article if your friends have problem on “certificate error” message or how to sign unsigned application.

More Nokia News, Themes and Application

• How to Solve Expired Certificate Error Message in Nokia 5800
• iDesk iPhone Style Application for Nokia S60v5
• Thread SMS Lite for Nokia S60v5
• SBSH FExplorer Pro v2.10 for S60v5
• Friendster Mobile v.1.0 for Nokia 5800

This entry was posted on Monday, October 18th, 2010 at 9:36 am and is filed under Nokia Tips. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.