I'm trying to sell my 4S (5.1.1), but I'd like to wipe it clean of all personal information that can be used against me... WITHOUT upgrading to iOS6. I understand I can't go back to factory 5.1.1 because the new redsn0w is not out. Are there any outstanding files I should delete? I have purcahsed maybe 2 things on Cydia. Should I just wait for redsnow before I sell?