Help! My Symbian OS no longer works!

[Lumino]

Help! My Symbian OS no longer works!


Hi, I just bought a Nokia 3660 and downloaded an application from a link on this site and tried to install an extended recorder. However, when I put it onto my phone, it didnt install completely and crashed my phone.

When I rebooted my phone, it no longer worked. I am getting system erros when trying to access menus. The only thing I can do is dial numbers and receive calls. No messaging, no other apps.

I'm really stressed out, can someone please give me some advice on what to do? I'm totally lost and feel so stupid for trying to install apps from unknown sites.

EDIT:

I took out the MMC, and it seems to be working. But I think it's still screwed somehow, because it the application list, it has the programs that were installed on the MMC, and when I try to remove the one that screwed up my phone, it obviously doesn't work. What can I do? Should I reformat the MMC or something? How?