Is there a customer service phone number? AT&T Customer Service Phone Number 1-800-288-2747. AT&T is a communications giant that is the largest provider of mobile phone service and home phone service.What is enterprise customer service number? Enterprise Customer Service Phone Number (fastest): 1-800-264-6350. Hours: 24 hours, 7 days; best time to call: 8:30am.Is there a customer service telephone number for? General Customer Service: 1-877-383-4802. For faster customer service, please use the links above to contact the appropriate customer service center for your specific needs.
Contact Us Corporate Phone Number and Headquarters Corporate Phone Number and Headquarters Select link for details about Emdeon Corporate Headquarters and other locations. Product Support Product Support contact information listed by product.