Is a Fon subscription right for you? Fon is a start-up wireless broadband network that uses other people’s bandwidth to get its clients online. Currently many people use someone else’s open WiFi network to get online, a practice that is generally a violation of the subscriber’s service contract. But that may soon change. Time Warner Cable has signed a deal with Fon that lets its user share their unused bandwidth with Fon customers. Meaning that Fon customers can now use these WiFi services worldwide and, in some cases, the ISP and subscriber will see a small profit for sharing.