This document provides an overview of AT&T Inc., a telecommunications company. Some key details include: - It is a mobile service provider that trades on NASDAQ and offers wireless and wireline services internationally. - It was spun off from AT&T Corp. in 2005 and has grown through acquisitions to become the second largest provider of mobile and fixed telephony in the US. - A financial analysis shows AT&T has strong financials and brand recognition but also operates in a highly competitive industry facing threats from substitutes and regulatory issues.