If you're here looking up AT&T Wireless customer care, you probably already know who they are. But it helps to get an idea of how big they are and what their support operation looks like if you are a customer. AT&T Wireless also goes by or is associated with the names AT&T, AT & T, ATT, ATT Wireless. They are considered to be part of the following sectors and industries: wireless, telecommunications. AT&T Wireless is associated with terms like mobile telephony, wireless broadband services, subsidiary of at&t by their customers and industry analysts. Their competition, in the eyes of customers, are companies like Sprint, Verizon Wireless, T-Mobile. They employ 241,000 people according to customers in the know.