Did you ever back it up or sync it with your PC? Then the backup files or the PC program may still hold them
OK, let's try first to find out if the backup file you have is "valid", meaning it has the contacts, sms's files etc. that is expected to be there.
First try to locate the backup file in your PC:
The file extension is xxxx.nbu (if you have used the latest PC Suite to make the backup).
If the backup file is relatively old, the file extension can also be .nfb or .nfc
Normally the default place to store the backup file is something like:
C:\Documents and Settings\(your user name, if applicable)\Application Data\Nokia\ContentCopier
If you locate the file, check first that the backup file size is reasonable (I just made a backup of my N95 and it was more than 72 MB), if the file size is only a few kB, it is an indication that the backup file is not valid, something has gone wrong when you made the backup (altough the PC Suite has not warned you about it.)
If you locate the file, you can open the file with for example notepad. You will see that the content is messy, but you can try to use the notepad's Edit - Find with a string that you know , maybe a phone number or first name, so you can see, if your contacts actually are in the middle of the "mess" in the backup file.
Another alternative is this applet that Miksu has suggested to use in emergencies like this:
If you want to try it, you can download it from here:
http://nds1.nokia.com/files/support/global...ct_Transfer.exeLet us know if any of this was helpful. If you need more help, please let us know that is the data you more urgently need to "save" from the backup ?