Jailbreak and Unlock are two different terms but they are both usually confused. Jailbreaking allows a user to install third party applications, software, themes and removes the limitations that are on the apple device. In short it gives the user the root access to iOS whereas unlocking means the user can switch between network carriers.
To jailbreak visit jailbreakiphone4sim.com and for permanent unlock service use Mobileunlocksolutions.com