AT&T Store San Jose Stevens Creek

great customer service, I had problem during installing my WHP and couldn't activate it. I tried several times but error was popping up. I called the number for help for activating my device but no luck except wasting my time for several hours, dealing with rude representatives and constantly passing me between different department which each one was telling me it is not related to us call different number! I was so frustrated especially when AT&T sending me letter that "if you don't install new device your old device will be disconnected and your home phone will not operate!" I desperately went to store in Valley Fair Mall in San Jose and McKinley store in Sunnyvale several times, they were not help full at all and said they can't help me. I should call 1-800 number. finally I decided to try AT&T store in 5180 Stevens Creek Blvd, and said to myself if nobody help again, I will disconnect my WHP for good. But against my expectation, their representative Mario Cook was so helpful and professional .he immediately knew what I am talking about and start to help me by activating my device. He was getting error too so he had to make couple phone calls. He spent about one hour to find the problem and solve it. He was so patient, skilled and polite. while I was waiting until he connect my device , I observed that he had the same professional mannerism toward other customers too. I want to thank Mario Cook very much. he is the best.