How much bandwidth does FFXI use?

If you won’t do anything other than browse websites (no streaming videos/music) and play FFXI, you won’t go over 50~60mb per day. Provided you play 5-6 hours of FFXI a day. 1gb data plan is pushing it, but 2gb per month is too much. You will probably need 1.5gb at most if you play FFXI everyday for 5-6 hours.