Hi I am selling my 4S to my brother in a few days when my iPhone 5 arrives. He wants to buy it jailbroken, but obviously wants to sync it with his own apps/data etc. What is the easiest way to do this? Can I just go into the settings and reset all settings, or erase all content and settings? Will either of those remove my iTunes account, contacts, emails, messages etc without removing the jailbreak? Or do I need to fully restore in iTunes and rejailbreak? Thanks.