How to remove certificate error from Nokia N97,5800 and symbian^3 : N8, C7, C6-01 , X7, E6

Certificate error is the most common problem we face, when we install apps from other sources other than Nokia. Nokia do not allow any untrusted app to install in your phone.
It helps in protecting your phone from hackers, viruses and many other malwares but it is very annoying too as it blocks almost all the symbian apps and games that you want to install. So, whenever you want to install any untrusted app, it will give you an error as "Certificate error : Contact the supplier as shown in image .
You can remove this error by signing your app and games by the the certificate particularly generated for your phone.


To remove this error , you need to sign the app with the certificate generated for your phone specifically dependent on your IMEI (dial*#06#  to know your IMEI).

Now to remove this error, just enter your IMEI in certificate generator below
and enter security code, press submit.



It will take about 12 Hours to generate certificate, visit this site again, enter your IMEI and security code again. It will redirect you to download page from where you can download your certificate.

See the image below, click on the link (In Chinese) as shown in image on the your download page to download your certificate.

      • To sign apps with your certificate and key, you can use SignsisTool or on mobile you can use FreeSigner. In case of any problem, you can contact me via contact form .

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