Applied online did video interview and was phone called for in-person interview. Met with manager one on one as she went over my resume that I brought in. Asked about 5 questions in total which were average to difficult. I would say to be prepared to talk about why you want to work for AT&T, how people would describe you, and your experiences being mentored by someone. At the end I was asked to engage in a conversation with a Mandarin speaking associate in Mandarin to assess my fluency.