The way I see it, you really have nothing to lose. Do a backup; to be safe I recommend backing up to your PC/Mac. Restore to 5.1.1 (while technically this is downgrading, Apple is still signing this, so you will have no issues). You may have to shift/command click the 5.1.1 ipsw to get it going. From there, set it up from the back up ans see if your data transfers over. If it didn't, you still don't need to stress. You can always upgrade back to iOS 6.0 (same method as above with the correct ipsw) and restore your data from there.
yes I see what you are saying. but i do not believe an ios6 backup will work with ios 5. see no harm to try though
I tried to downgrade my brother's phone, I backed up to iCloud before putting it in DFU mode and restoring to 5.1.1
Once it was finished I tried to restore from the iCloud backup but the backup wasnt listed! Any possibility that since it backed up as an iOS 6 device it wouldnt be visible to an iOS 5 device?
then read this one...short answer: you can't. ios6 backups cannot be restored to an ios5 device.
[sarcasm] if you were a developer, you would know this [/sarcasm]
like i said, you cannot restore an ios6 backup to an ios5 device. your mac simply will not recognize the backup as a valid backup. believe me, i've gone through the process. when you tell your mac to restore from a backup, it will only select any existing ios5 backups. the same will happen with an icloud backup.