Digital Workshop

Tether has been used on carriers all over the world, meaning customers can travel country to country without worrying how to set it up depending on the new carrier network they may be roaming on, the company claims.
Tethering's HTML5 app works by setting up the iPhone as a proxy server, thus the user creates an ad-hoc Wi-Fi network and then runs Tether's desktop software to direct HTTP traffic to the iPhone. The HTML5 page loaded on the iPhone thus pushes the traffic to the Internet and returns with the resulting data, bypassing Apple and wireless network operators.