My brother got his first iphone the day that JBme3.0 came out. He bought the phone, came home, jailbroke it, and was ecstatic. Ever since, phone has been extremely unstable and he is constantly needing to reboot it. it locks up, it hands, it will, at times, not let him make outbound phone calls, etc. It's a PITA. What can he do to remedy? Will he be forced to restore? Will he be able to re-jailbreak if he didn't use tinyumbrella?