View the security, infrastructure, and application workload features of Windows Server 2016 as compared to previous versions. 1  Download a Windows Server feature comparison summary. 2  Download the complete feature comparison guide.
ATT Email Support > ATT Email Customer Service 1-800-259-1237. AT&T is an American multinational telecommunications provider, AT&T is the second largest provider of mobile telephone and the largest provider of fixed telephone in the United States, and also provides broadband services.
Steps. 1  1. Locate and call the AT&T customer service number listed on your receipt. If you don't have a receipt or can't find the number, either dial 611 from your cell phone or dial 1-800-331-0500 from any phone. 2  2. Ask to cancel your wireless service.