I have never worked in as toxic environment as it is at AT&T. From coworkers to management. Coworkers will use any opportunity they can to throw you under the buss or to take credit for something you did. Management thinks it's okay to scream at employees like madman. HR is utterly useless, even if you try to do something about it.
Coming in to work has become so bad that I have issues getting out of bed and making myself move knowing what I'll be walking into. I am looking for a new job, but it's not a quick process, and I can't afford to simply quit without a replacement. But I know now that taking the job at AT&T was the worst decision I ever made.