# Business customer phone numbers | Developer Documentation

<div id="bkmrk-business-customer-ph">## Business customer phone numbers

<div><span>Updated: Feb 27, 2026</span></div><div>This document describes business customer phone numbers, their requirements, and endpoints commonly used to manage business phone numbers.</div><div id="bkmrk-basics"><div id="bkmrk-basics-1"><div>### Basics

</div></div></div><div>Your business customers need a dedicated number to use WhatsApp. Phone numbers already in use with the WhatsApp app are not supported, but numbers in use with the WhatsApp Business app [can be registered](/books/meta-whatsapp/page/onboarding-whatsapp-business-app-users-aka-coexistence-developer-documentation).</div><div>Business customers can have multiple phone numbers associated with their [Meta Business Account<span>?</span>](https://business.facebook.com/settings/), so they can [add another number for API use](#bkmrk-add-phone-numbers-to-1) if they wish.</div><div>When completing the Embedded Signup flow, your business customers should use a phone number and display name that they want to have appear in the WhatsApp app. We strongly discourage signing up with a test or personal number, or test display name, as are difficult to change.</div>
<span>For more detailed information relating to phone numbers and WhatsApp for Business Platform, see [Phone Numbers](/books/meta-whatsapp/page/business-phone-numbers-developer-documentation).</span><span>For information on how to migrate an existing registered WhatsApp phone number, see [Migrate Phone Number](/documentation/business-messaging/whatsapp/solution-providers/support/migrating-phone-numbers-among-solution-partners-via-embedded-signup).</span><div id="bkmrk-instructions-for-bus"><div id="bkmrk-instructions-for-bus-1"><div>### Instructions for business customers

</div></div></div><div>This section is directed towards customers of Embedded Signup and provides guidance about actions they may perform relating to phone numbers.</div><div id="bkmrk-add-phone-numbers-to"><div id="bkmrk-add-phone-numbers-to-1"><div>#### Add Phone Numbers to a WhatsApp Business Account

</div></div></div><div>There are two methods to add additional numbers to a WhatsApp Business Account (WABA):</div>
<span>**\[Recommended\]** Go through the embedded signup flow again, select the existing Business Manager &amp; WABA, add the number, and verify it.</span><span>In the **Business Manager**, go to the **Phone Numbers** tab of **WhatsApp Manager**, and select **Add Phone Number**. When using this option, the Solution Partner has to manually verify the phone number as phone verification is not available in the Business Manager. For this reason, it is recommended that businesses follow the embedded signup flow to add additional numbers.</span><div id="bkmrk-learn-more"><div id="bkmrk-learn-more-1"><div>### Learn More

</div></div></div>
<span>[Phone numbers: WhatsApp for Business Platform Overview](/books/meta-whatsapp/page/business-phone-numbers-developer-documentation)</span><span>[Phone numbers: Migrate an existing registered number](/documentation/business-messaging/whatsapp/solution-providers/support/migrating-phone-numbers-among-solution-partners-via-embedded-signup)</span><span>Reference: [WhatsApp Business Account](/documentation/business-messaging/whatsapp/reference/whatsapp-business-account/whatsapp-business-account-api)</span></div>