I used 2.7 GB, I was conned into switching my unlimited along with the rest of my family plan members to 10GB a month. Turns out they left out the fact that if you don't have WiFi your screwed! It cost less per month, but it also cost $15 for 1 GB over. It was a rip off! We live in remote area and some of us don't get service at home and don't have WiFi. What a trap and money maker for ATT.