Quiz_Master said:
No 6820 is based on Symbian Series 40 Operating System.
And AFAIK In all mobiles OS resides in ROM, so it can't get currupt unless ROM is physically damaged. And I didn't find any solution to backup the OS.
If something happens to your mobile (or its OS) the best thing to do is to take it to Service Centre.
i had already taken it to the main head office of nokia in bangalore and even they didnt have the software for reinstalling the OS and i searched a lot and finally found some guy who repaired my cell..... i dont want tat to happen again so i need to take a backup of my current OS buddy tat is my i'm askin.... any help