Facebook, the most popular social networking website in the world, today launched a special mobile version of their site: 0.facebook.com. This mobile website is optimized for the most of the devices – and many operators are offering free access to this site.
According to Facebook, this special mobile version of Facebook will be available only on the networks of these operators. Users can still access Facebook’s default mobile website, m.facebook.com and the site for touch screen devices, touch.facebook.com, from any operator worldwide.
In India, Reliance and Videocon are offering free access to 0.facebook.com. In Pakistan, Mobilink will offer this service. More details can be obtained from here.

0.facebook.com
Facebook says about this site:
Rather than making photos viewable on 0.facebook.com, we put the photos one click away so they don’t slow down the experience. You can still view any photos on Facebook if you want but your regular data fees will apply.
Using 0.facebook.com is completely free. People will only pay for data charges when they view photos or when they leave 0.facebook.com to browse other mobile sites. When they click to view a photo or browse another mobile site a notification page will appear to confirm that they will be charged if they want to leave 0.facebook.com
Enjoy the free access! Thanks Facebook. :)