0. facebook.com, a special mobile-only site that can be accessed free of charge on select carriers across the world. This text only site is very low on bandwidth, but includes core functionality like News Feed, status updates, profile Walls and messaging.
Check with your Local mobile operators as the list is not updated. Now you need to have Facebook account upgraded to the new Facebook email and get your own @facebook email id .
The next step involves setting up auto forwarding from your email id to your Facebook email id; here I am using Gmail account. click on the settings link on the right corner of your Gmail account.
Now you need to click on the options Forwarding and POP/IMAP ,now enter your Facebook email id and click next.
Now if you check your Facebook messages you will receive a confirmation code (number) ,copy the confirmation number and paste the number in the box anclick on verify.
Now as soon as you receive any email on your Gmail account it gets forwarded to your Facebook email/messages and you can access these messages on your mobile device on 0.facebook.com free of cost.
Note: You can only receive text right now as pictures and attachements are filtered on facebook zero.