Some cellphone carriers restrict users from desktop web-browsing on low value data plans and when trying to access any website from computer they are blocked and something similar to following is shown instead of loading the webpage.

While this is tested with Indian carrier Aircel, this should work on all carriers and data plans which allow web-surfing on mobile-phones but block access on desktop browsers. The trick is to send fake "web browser identifier" (User-Agent) to the server making them believe we are browsing through a mobile webbrowser.

To get this working you will need to spoof your User-agent string to some mobile browser like iPhone and this can be done easily using free addons for Firefox and Chrome web-browsers :