I had my iphone jailbroke all summer and then after awhile I realized that my father's iphone was a lot faster. After I restored mine I had great signal and no problems. This weekend I decided to jailbreak again at 2.1 and now I have terrible signal and data speeds. I really want to keep mine jailbroke but I can't get good signal. I don't know if there is something I need to disable but its just terrible at the moment. I figured I'd inquire here before I just restore and go without the joy of a jailbroken iphone. Also I found another topic similar to this and they just recommended redoing it and I've already done that.