Originally Posted by NiLuJe
@Gazella: Which custom fonts?
But anyway, since a factory reset wipes the user partition, the answer is: yes, of course they will be gone (as will everything on your device: books, pictures, whatever, ...). (And, no, this has nothing to do with the JB).
I mean, if I were to remove the jailbreak completely, will I be able to add custom fonts after doing that? Or does my device have to be jailbroken for fonts?