where should I mail a complaint to AT&T
File a complaint by visiting support.fcc.gov, click on Complaints,,click on Filing Consumer Complaints,, click on Wireless Telephone and click on the appropriate type of complaint. Complain to the FCC by an alternative method. You may also file a complaint by telephone, fax, email or mail.ubmitting Complaints. Submit complaint to AT&T. Reach customer service by calling (800) 331-0500. Submit a complaint letter to AT&T Headquarters, AT&T Inc., 175 E. Houston St., San Antonio, TX 78205.