I really had bad experience with AT&T customers service. As you might see this attachment below, I supposed to have 25% discount on my data plan. however, when I received the bill yesterday, I found there is no discount on my data plan. So I called the AT&T for this disputable bill issue twice, but anyone denied this discount applied to 3Gb data plan. I said I have the discount information when I placed the order on Sept. 14th as documented in this attachment. But one staff recommended me to the Office or store at 1329 Beacon st. Brookline, MA. Next, a horrible thing happened to me. at 1pm Oct. 7th, I entered the store, asked to see the manager. A lady came to me, asked what's the question I had. When I mentioned the issue, she was completely inpatient to me that it's impossible to have a discount on your 3 Gb data plan, and nothing she can do. She took my bill and personal information , and came to her office while yelling to me" you have to leave my store immediately!!!" So I called the police. BUT, the police just asked me to leave their store while warning me that it's their private space and I have to leave immediately when they expelled me. I was really frustrated by AT&T customers service! I was sure I have leave AT&T again, and back to Verizon. Frustrated with AT&T. Best to your customers service improvement in the future.