Today trick for use to free Facebook courtesy grammenphone,banglalink and airtell operator .
many user know this system, if you don't know yet, see how it possible
Don't miss it : 3G FREE NET FOR GP GP FREE INTERNET FOR PC Banglalink free net
follow below steps for it
1. first active pay per use internet in your sim
2. active internet option in your mobile and sim
3. then visit 0.facebook.com from opera mini and Dolphin browser
it is only available for mobile device