A lot of iPhone users are not happy with the restrictions Apple puts on its users and iPhone owners. Being limited to one service provider is just one of the restrictions many people would like to get around. There are many others and there is a way to bypass all this:
Jailbreaking is a download program which ‘Jailbreaks’ their phone. Users are able to bypass the restriction set by Apple . Have a look at this infographic and decide for yourself if it is worth it.
Source: The JailBreak Shop