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I tried that, but it doesn't sync all notes. Any clues on how does it select which ones to sync?
 
make sure your icloud email account is setup as well...even if you don't use it for email. I'm not 100%, but I'm pretty sure it uses the email infrastructure to sync your notes.
 
From what I can tell, if you look in notes you will have two groups. In iCloud and On This iPhone (device). There doesn't appear to be a way to move the notes on a device into iCloud.

I am not sure if that should be a feature request or not.
 
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