Im a first time iPhone user so this is all new to me. Im wondering if jailbreaking an iPhone would mess up and spoil the original OS or hardware(if possible). I heard from a friend who has jailbroken his iPhone 3GS that his phone slows down and lags after a few months of jailbreaking, it becomes almost unusable. Can people who have jailbroken their iPhones before and left it for the long run tell me how it handles? Does everything work like there isn't a jailbreak? I only plan to improve the physical appearances with apps such as NCColours that changes the background colour of your notification centre. I also installed SBSettings and Accelerate for practicality reasons. I dun plan to control robots or anything. I'm sorry that this is such a long post. I've had terrible experiences with Androids that slow down and lag in the long run.