Please see below details about the service:
To download the application, write ‘FB’ and send to 5000 or visit http://wap.gpworld.com
The offer is valid only for browsing Facebook through the Facebook Java Application supported in around 2,500 Java supported mobile phones (For handset support related issues please visit “Help” section of Facebook). Grameenphone is going to introduce Facebook Java Application for its subscribers with free data offer for 30 (thirty) days from the day of launching the application. All GP users can avail this free browsing offer starting from 00:00 AM, 28th of July, 2011 till 11:59 PM, 26th of August, 2011.
After the free browsing offer expires regular data charge will be applicable as per subscribed data plan (P1-P9).
News Source: grameenphone.com