When he wants to install new applications on mobile symbian v3, you can not find the message "Certificate Error – Contact the application supplier”
This occurs because the application will be installed instead apikasi sign, which turned out to be an error message. To overcome this there is one simple tips you can do.
Open Menu → Tools → App. Manager → Options → Settings → Software installation - later changed to "All", then restart (power off and on again) your phone. good luck
NB: these tips apply only to some symbian phones
