MCI - Customer Service

Customer Service

The most convenient way to manage your MCI account is to handle it yourself - online. View your invoice, make a payment, upgrade your service, and much more - whenever you like, 24 hours a day, 7 days a week. With MCI, managing your account online is fast and easy. If you need to speak to someone right away, our toll-free Customer Service numbers are accessible below.

Pay Bill

If you are an MCI Business Complete customer you can relax knowing your account is always up-to-date. Choose an EasyPay automatic billing solution using your credit card or direct debit, and you'll save $1 every month plus earn up to 60 free minutes!*

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Check Voicemail

Your MCI account offers convenient message notification and retrieval options. Receive new voicemail message alerts via your pager, cell phone, or e-mail. Access your messages wherever you are, by phone or on the web.

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Calling Card Instructions

Need help making a calling card call? Find instructions on placing calls from the U.S. or from over 125 countries and places around the world.

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Service Phone Numbers

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

Questions about MCI Small Business products? Use our easy online form to submit your inquiry.

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New Products & Services

Get everything a small business needs to set up shop, stay connected to clients and increase productivity. Calling plans, high-speed Internet access and lots more. For companies with fewer than 20 employees and/or one office location.

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* 60 free minutes offer applies to new EasyPay customers only. Offer does not apply to unlimited or block-of-time calling plans.