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MCI offers customer support for all your service needs. You may contact our representatives by phone or e-mail using the information below. If you are a current MCI Consumer customer, you can log in to our secure customer website to access your account information or e-mail Customer Service.
Find a Customer Service number. Browse information on MCI's services and find answers to frequently asked questions. Browse Info & Answers. Current MCI customers can get updates, news, and special offers via e-mail. Sign up for E-mail Alerts. Need help deciding? Compare plans.
Contact MCI. We welcome your feedback and are eager to help answer your general questions. If you are a current MCI Consumer customer and you have a specific question about your account or need to make account updates, you must log in to our secure customer website to e-mail Customer Service.
If you'd rather speak to someone directly, the answers to your questions are just a phone call away. Look for the toll-free Customer Service number you need from the link below. Find A Customer Service Number
If you'd like to speak directly with an MCI Customer Service Representative, call the toll-free number that applies to the product that interests you. Existing customers should have their account number available when calling.
Contact MCI. We welcome your inquiries and are happy to answer your questions. Please choose from one of the following options to contact us: Get a complete list of our Customer Service numbers so you can call us with questions about the products that interest you. Back to Top.
If your question is not answered, simply click on the "Contact Us" tab in the toolbar. From there, you can send an e-mail to Customer Service, to which you can expect a response within 24 business hours. Alternatively, you may contact Customer Service by phone at 1-800-444-3333. Questions About This Website.