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| This page provides answers to commonly asked questions handled by our customer service representatives. |
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| What is ZPDI? ZPDI is a billing clearinghouse that processes charges on behalf of operator service providers and long distance carriers that provide service for hotels, motels, hospitals, payphones, universities, and correctional facilities. |
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| How do I contact customer service? To submit an online billing inquiry, completely fill out the form on the customer service page. |
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| You may also obtain customer service support by dialing the toll free number located on your phone bill. |