N-Gage 2.0 troubleshooting

> Why do I get "Certificate Error" and I'm not able to install?You need to sign any files before installing them (or hack your phone).Signing tutorial -click hereHacking tutorial -click here> How can I back up my game progress, save data?Always make a back-up of all the files and folder in ("C:\private\20007b39"). Then place it back again, overwrite, to bring it back. this is good when updating