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.
Unlock. From The iPhone Wiki. Unlocking an iPhone means taking an iPhone that is locked to a specific carrier and making it usable on other carriers. A software unlock is the process by which the iPhone is modified such that the baseband will accept the SIM card of any GSM carrier.This is entirely different than a jailbreak; jailbreaking one's iPhone does not unlock it. A jailbreak is, however, required for all currently public, unofficial software unlocks. software unlock is the process by which the iPhone is modified such that the baseband will accept the SIM card of any GSM carrier.