You can reach SBCGlobal customer service by calling one of the following numbers: 1-888-634-1444 (Toll-free) or 800-288-2020 (Toll-free). These numbers connect you to customer service representatives who can assist with various email-related issues. Make sure to call during the business hours for quicker assistance. If you prefer, you can also use the live chat option on the AT&T support website for real-time help.