According to the Washington Post, jailbreaking iPhones and other smart phones is a lucrative business.
Kevin Lee, a George Mason University senior, says he earns about $50,000 a year with an illicit-sounding pitch on Craigslist: “Get Your iPhone Jailbroken Today.”
If you want to get started jailbreaking phones, don’t worry, it is not illegal in the United States. Under the DMCA of 2010, jailbreaking is legal in the United States, although it voids Apple’s device warranty.
To get started in this business, just Google “how to jailbreak iphone”. There will be plenty of pages to get you started.