Procedure to re-install Nokia S40 certificates
All you need to do is to open the certificates in the phone’s default browser. Opera Mini or Nokia Browser will NOT work. I’ve uploaded the certificates onto the server here, so it is just a few easy steps for you. Compose a new SMS in your phone. Write http://bit.ly/NokiaCertificate as the content. Now either save this SMS as draft or send it to your own number so that you can access its content in the message viewer. In the message viewer, select the link and open it (tap on it in case of touch phones). From the page that opens (http://resources.techmesto.com/NokiaCertificates/), keep clicking on the various certificates and Install them. The certificates will be installed and available for approving signed apps. To confirm, you can Goto Settings> Security> Authority Certificates Alternative Way: If you have access to entering the web address in your default browser (web), you can just skip the first 4 steps and instead manually enter the address http://resources.techmesto.com/