brothers i need ur help my n900 camera is not working any time i on it it shows operation fialed pls i need help if someone can tell how to fix it thanks

You have installed one stupid "Bless N900" photo application.
Just un-install it. If it still doesnt work let me know

yes my brother ur right i installed one photo app but i have uninstall it but it stil dont work pls help me

Go to settings,
Restore original settings from the drop down option on top of the page.
After this you can make a backup to which you can always return.
If this doesn't work, you will need to re-flash your phone.
Its fairly easy to do but you need to get help if you are not technically minded as it can destroy your phone completely.
Which state do you stay?

my brother i stay in adamawa state you say i should go to setting and restore original setting pls wat of the vidoes and music,opera will all of them delect

bros i have done the restore setting and the camera stil dont work