For example, an Iowa district court in November 2006 halted all sales of See Clearly Method kits that had been marketed for several years by a company called Vision Improvement Technologies as a way to improve vision through eye exercises.
Jailbreaking is a hack that allows developers to access the file system of your iPhone, iPad, iPod Touch, meaning the root directory. In simpler terms it means that developers can now have access to all the files on your iPhone, iPod Touch, iPad meaning they can create apps that are possible of doing pretty much anything.
6. Just connect the iPhone to your computer and click restore in iTunes. This will put the latest iOS on the phone and remove the jailbreak. You can re-jailbreak with RedSn0w if you wish. Just remember to backup the iPhone first so you won't lose any data.