First round was a quick 15-minute phone debrief. Second round was a take-home coding assignment dealing with OOP that was pretty easy. Third round was a technical interview walking through the assignment (be ready to talk about technical decisions and how to improve). The last round was a low-pressure behavioral interview.
How to make your code faster.
The following metrics were computed from 5 interview experiences for the AT&T Software Engineer Intern role in United States.
AT&T's interview process for their Software Engineer Intern roles in the United States is fairly selective, failing a large portion of engineers who go through it.
Candidates reported having very good feelings for AT&T's Software Engineer Intern interview process in United States.