I have been with ATT for 10+ years. The rates kept increasing and increasing. When I finally left them, it was 3 days after my billing cycle began. No prorating.Straight up charged me $82 full fee for a month for 3 days use telling me “we don’t prorate.” I had considered going back to ATT eventually when money was better due to the great customer service, but after this experience, I will not ever be returning. Increased rates, bad experiences with customer service, and straight up way too expensive to begin with. Just a heads up for anyone trying to cancel, they will charge you the full fee regardless of when you canceled. You live and learn.