# Error 30034: Linking a Phone Number to an Approved A2P Campaign > Learn how to link a GHL Customer Care number to an approved A2P campaign, check A2P Verified status, and troubleshoot SMS error 30034. - Source: https://docs.ghlcustomercare.com/docs/phone-system/a2p-registration/error-30034-linking-a-phone-number-to-an-approved-a2p-campaign - Section: Phone System / A2P registration - Reading time: 4 min - Images: 6, each explained below - Modified on Tue, 8 Sep at 5:26 AM --- After your A2P brand and campaign are approved, each applicable phone number must be associated with the approved campaign before it can use the registered messaging route. Linking the number helps ensure compliant SMS and MMS delivery through a 10-digit local number. This process is also useful when you purchase an additional number or encounter SMS error **30034**. --- **TABLE OF CONTENTS** - [What Is A2P Campaign Linking?](#what-is-linking-phone-number-to-a2p-campaign)[](#requirements-before-linking-a-phone-number) - [Requirements Before Linking a Phone Number](#requirements-before-linking-a-phone-number)[](#how-to-link-a-phone-number-to-an-approved-a2p-campaign) - [How to Link a Phone Number to an Approved A2P Campaign](#how-to-link-a-phone-number-to-an-approved-a2p-campaign)[](#troubleshooting-error-30034) - [Troubleshooting Error 30034](#troubleshooting-error-30034)[](#frequently-asked-questions) - [Frequently Asked Questions](#frequently-asked-questions)[](#related-articles) - [Related Articles](#related-articles) --- # **What Is Linking Phone Number to A2P Campaign?** A2P campaign linking associates a specific phone number with an approved A2P 10DLC campaign. This connection tells carriers which registered business and messaging use case apply to messages sent from that number. A phone number may be available in GHL Customer Care without being linked to your approved campaign. When the association is complete, the number displays an **A2P Verified** label on the Phone Numbers page as shown in the screenshot below. A2P 10DLC registration applies to business messaging through applicable US 10-digit local numbers. Toll-free phone numbers do not use A2P campaign linking and follow a separate verification process. ![What Is Linking Phone Number to A2P Campaign? (image 1 of 6)](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/155077278498/original/TwrMJuVV-lSRnRCDEm9UOZ47RHbAC4a7ZQ.png) **What Is Linking Phone Number to A2P Campaign? (image 1 of 6)** This screenshot appears in the "What Is Linking Phone Number to A2P Campaign?" section of "Error 30034: Linking a Phone Number to an Approved A2P Campaign". The text alongside this image reads: A2P 10DLC registration applies to business messaging through applicable US 10-digit local numbers. Toll-free phone numbers do not use A2P campaign linking and follow a separate verification process. Immediately after, the guide continues: Campaign linking is available after the required registration steps have been completed. Confirming these prerequisites prevents you from attempting to link a number to a campaign that is not ready or not eligible for the number setup. - What this covers: A2P 10DLC registration applies to business messaging through applicable US 10-digit local numbers. Toll-free phone numbers do not use A2P campaign linking and follow a separate verification process. - Controls: A2P Verified - Next: Campaign linking is available after the required registration steps have been completed. Confirming these prerequisites prevents you from attempting to link a number to a campaign that is not ready or not eligible for the number setup. --- ## **Requirements Before Linking a Phone Number** Campaign linking is available after the required registration steps have been completed. Confirming these prerequisites prevents you from attempting to link a number to a campaign that is not ready or not eligible for the number setup. Before continuing, verify that: - Your A2P brand has been approved. - Your A2P campaign has been approved. - The phone number is an applicable 10-digit local number.  Need help registering your A2P brand or campaign? See [What is A2P 10 DLC: Brand and Campaign Registration](https://docs.ghlcustomercare.com/docs/phone-system/a2p-registration/what-is-a2p-10-dlc-brand-and-campaign-registration) **Important:** Sole Proprietor brands are limited to **1 campaign and 1 phone number per campaign**. If a Sole Proprietor sub-account has two or more local numbers, SMS error **30034** may occur even when one number was previously approved. Check the registration type in **Settings > Phone System > Trust Center** before linking additional local numbers. --- ## **How to Link a Phone Number to an Approved A2P Campaign** Properly linking the number completes the association between the sending number and its approved campaign. Repeat these steps for each additional applicable number that needs to use the campaign. 1. Go to **Settings > Phone System > Phone Numbers**. ![Step 1 of 5: Go to Settings > Phone System > Phone Numbers](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/155077278718/original/OKpUHwnT99VG2E3Tcn5iguO7NHMxz1e5ig.png) **Step 1 of 5: Go to Settings > Phone System > Phone Numbers** This screenshot accompanies step 1 of 5 in the "How to Link a Phone Number to an Approved A2P Campaign" section of "Error 30034: Linking a Phone Number to an Approved A2P Campaign". At this point in the walkthrough you go to Settings > Phone System > Phone Numbers. The navigation path used here is Settings > Phone System > Phone Numbers. The next step is to locate the phone number that you would like to link to an A2P campaign and select the three-dot menu on the right side of that number. If this number is not yet added to an A2P campaign, it will not have the green A2P Verified badge. - Path: Settings > Phone System > Phone Numbers - Where to go: Go to Settings > Phone System > Phone Numbers. - Controls: Settings > Phone System > Phone Numbers, three-dot menu, A2P Verified, Select A2P campaign to Link - Next: Locate the phone number that you would like to link to an A2P campaign and select the three-dot menu on the right side of that number. If this number is not yet added to an A2P campaign, it will not have the green A2P Verified badge. Full procedure: 1. Go to Settings > Phone System > Phone Numbers. <- this image 2. Locate the phone number that you would like to link to an A2P campaign and select the three-dot menu on the right side of that number. If this number is not yet added to an A2P campaign, it will not have the green A2P Verified badge. 3. Click on Select A2P campaign to Link. 4. Select the campaign that should be associated with the number. 5. Return to the Phone Numbers list and confirm that the green A2P Verified label appears beneath the number. 2. Locate the phone number that you would like to link to an A2P campaign and select the **three-dot menu** on the right side of that number. If this number is not yet added to an A2P campaign, it will not have the green **A2P Verified** badge. ** ![Step 2 of 5: Locate the phone number that you would like to link to an A2P campaign…](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/155077278839/original/9hWo3EXucMiJmdxZUTeqdUcR9A-4-SQFHg.png) **Step 2 of 5: Locate the phone number that you would like to link to an A2P campaign…** This screenshot accompanies step 2 of 5 in the "How to Link a Phone Number to an Approved A2P Campaign" section of "Error 30034: Linking a Phone Number to an Approved A2P Campaign". At this point in the walkthrough you locate the phone number that you would like to link to an A2P campaign and select the three-dot menu on the right side of that number. If this number is not yet added to an A2P campaign, it will not have the green A2P Verified badge. The navigation path used here is Settings > Phone System > Phone Numbers. The next step is to click on Select A2P campaign to Link. - Path: Settings > Phone System > Phone Numbers - What to choose: Locate the phone number that you would like to link to an A2P campaign and select the three-dot menu on the right side of that number. If this number is not yet added to an A2P campaign, it will not have the green A2P Verified badge. - Controls: three-dot menu, A2P Verified, Settings > Phone System > Phone Numbers, Select A2P campaign to Link - Next: Click on Select A2P campaign to Link. Full procedure: 1. Go to Settings > Phone System > Phone Numbers. 2. Locate the phone number that you would like to link to an A2P campaign and select the three-dot menu on the right side of that number. If this number is not yet added to an A2P campaign, it will not have the green A2P Verified badge. <- this image 3. Click on Select A2P campaign to Link. 4. Select the campaign that should be associated with the number. 5. Return to the Phone Numbers list and confirm that the green A2P Verified label appears beneath the number. ** 3. Click on **Select A2P campaign to Link**. ![Step 3 of 5: Click on Select A2P campaign to Link](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/155077275509/original/wY1rSPbGXUJzsKys4Sz7PWchZKCm6BRaWA.png) **Step 3 of 5: Click on Select A2P campaign to Link** This screenshot accompanies step 3 of 5 in the "How to Link a Phone Number to an Approved A2P Campaign" section of "Error 30034: Linking a Phone Number to an Approved A2P Campaign". At this point in the walkthrough you click on Select A2P campaign to Link. For context, this section explains: Properly linking the number completes the association between the sending number and its approved campaign. Repeat these steps for each additional applicable number that needs to use the campaign. The navigation path used here is Settings > Phone System > Phone Numbers. The next step is to select the campaign that should be associated with the number. - Path: Settings > Phone System > Phone Numbers - What to choose: Click on Select A2P campaign to Link. - Controls: Select A2P campaign to Link, Settings > Phone System > Phone Numbers, three-dot menu, A2P Verified - Next: Select the campaign that should be associated with the number. Full procedure: 1. Go to Settings > Phone System > Phone Numbers. 2. Locate the phone number that you would like to link to an A2P campaign and select the three-dot menu on the right side of that number. If this number is not yet added to an A2P campaign, it will not have the green A2P Verified badge. 3. Click on Select A2P campaign to Link. <- this image 4. Select the campaign that should be associated with the number. 5. Return to the Phone Numbers list and confirm that the green A2P Verified label appears beneath the number. 4. Select the campaign that should be associated with the number. ![Step 4 of 5: Select the campaign that should be associated with the number](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/155077278792/original/0TgMmp0Eiy34hQ84mwnFxzinlljjAgUSnQ.png) **Step 4 of 5: Select the campaign that should be associated with the number** This screenshot accompanies step 4 of 5 in the "How to Link a Phone Number to an Approved A2P Campaign" section of "Error 30034: Linking a Phone Number to an Approved A2P Campaign". At this point in the walkthrough you select the campaign that should be associated with the number. The navigation path used here is Settings > Phone System > Phone Numbers. The next step is to return to the Phone Numbers list and confirm that the green A2P Verified label appears beneath the number. - Path: Settings > Phone System > Phone Numbers - What to choose: Select the campaign that should be associated with the number. - Controls: Settings > Phone System > Phone Numbers, three-dot menu, A2P Verified, Select A2P campaign to Link - Next: Return to the Phone Numbers list and confirm that the green A2P Verified label appears beneath the number. Full procedure: 1. Go to Settings > Phone System > Phone Numbers. 2. Locate the phone number that you would like to link to an A2P campaign and select the three-dot menu on the right side of that number. If this number is not yet added to an A2P campaign, it will not have the green A2P Verified badge. 3. Click on Select A2P campaign to Link. 4. Select the campaign that should be associated with the number. <- this image 5. Return to the Phone Numbers list and confirm that the green A2P Verified label appears beneath the number. 5. Return to the Phone Numbers list and confirm that the green **A2P Verified** label appears beneath the number. ![Step 5 of 5: Return to the Phone Numbers list and confirm that the green A2P…](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/155077278820/original/8TFxBCaFoc9c2JajByNnL7c8BZEPKiBjVg.png) **Step 5 of 5: Return to the Phone Numbers list and confirm that the green A2P…** This screenshot accompanies step 5 of 5 in the "How to Link a Phone Number to an Approved A2P Campaign" section of "Error 30034: Linking a Phone Number to an Approved A2P Campaign". At this point in the walkthrough you return to the Phone Numbers list and confirm that the green A2P Verified label appears beneath the number. The navigation path used here is Settings > Phone System > Phone Numbers. - Path: Settings > Phone System > Phone Numbers - How to confirm: Return to the Phone Numbers list and confirm that the green A2P Verified label appears beneath the number. - Controls: A2P Verified, Settings > Phone System > Phone Numbers, three-dot menu, Select A2P campaign to Link Full procedure: 1. Go to Settings > Phone System > Phone Numbers. 2. Locate the phone number that you would like to link to an A2P campaign and select the three-dot menu on the right side of that number. If this number is not yet added to an A2P campaign, it will not have the green A2P Verified badge. 3. Click on Select A2P campaign to Link. 4. Select the campaign that should be associated with the number. 5. Return to the Phone Numbers list and confirm that the green A2P Verified label appears beneath the number. <- this image --- ## **Troubleshooting Error 30034** Error **30034** can occur when the sending number is not linked to a valid, approved A2P campaign. It can also occur when a **Sole Proprietor** registration has more than one local number, because Sole Proprietor registrations only support one local number per campaign. Before escalating or re-registering the campaign, check the following: - Go to **Settings > Phone System > Phone Numbers** and locate the sending number. Confirm whether the number displays the green **A2P Verified** label. If the label is missing, use the steps above to link the number to the correct approved A2P campaign. - Go to **Settings > Phone System > Trust Center > Brands and Campaigns**. Confirm whether the account is registered as **Standard** or **Sole Proprietor**. If the account is **Sole Proprietor**, confirm that only one local number is being used. If there is more than one local number in a Sole Proprietor account, reduce the setup to one local number or review whether the business should complete Standard registration instead. --- ## **Frequently Asked Questions** **Q: Does campaign approval automatically link every phone number?** No. Check each applicable number on the Phone Numbers page. A linked number displays the green **A2P Verified** label. **Q: Can I link an additional phone number after my campaign is approved?** Yes, when the registration type supports additional local numbers. Sole Proprietor registrations are limited to 1 campaign and 1 phone number per campaign. **Q: How can I tell whether a number is already linked?** Look for the green **A2P Verified** label beneath the number in **Settings > Phone System > Phone Numbers**. **Q: How can I tell whether the account uses Standard or Sole Proprietor A2P registration?** Open **Settings > Phone System > Trust Center > Brands and Campaigns** and review the registered brand type. **Q: Why is the approved phone number also getting error 30034?** Error 30034 can occur when the sending number is not linked to a valid approved A2P campaign. First, check whether the number displays **A2P Verified** in **Settings > Phone System > Phone Numbers** and link it to the correct campaign if needed. If the account uses Sole Proprietor registration, error 30034 can also occur when the account has multiple local numbers, because Sole Proprietor registrations only support one local number per campaign. **Q: Why does my number not display A2P Verified after purchase?** The number may not yet be associated with an approved campaign. Use the three-dot menu to check whether a campaign can be selected. Before linking, confirm whether the account uses Standard or Sole Proprietor registration. **Q: Can a toll-free number be linked to an A2P campaign?** No. Toll-free numbers use a separate verification process and do not use A2P 10DLC campaign linking. --- ## **Related Articles** - [What is A2P 10 DLC: Brand and Campaign Registration](https://docs.ghlcustomercare.com/docs/phone-system/a2p-registration/what-is-a2p-10-dlc-brand-and-campaign-registration) - [A2P Campaign Registration: Step by Step Guide and FAQs](https://docs.ghlcustomercare.com/docs/phone-system/a2p-registration/a2p-campaign-registration-step-by-step-guide-and-faqs) - [Registering Your A2P Brand](https://docs.ghlcustomercare.com/docs/phone-system/a2p-registration/registering-your-a2p-brand) - [LC Phone System - Error Code and Warning Dictionary](https://docs.ghlcustomercare.com/docs/phone-system/lc-phone-system/lc-phone-system-error-code-and-warning-dictionary) --- Documentation for GHL Customer Care. Support: support@ghlcustomercare.com