# Text Message Number Configuration

## Text Message Configuration

To send text messages from Hackle, the following must be completed in advance: 1) Pre-registration of sender number (compliance with Telecommunications Business Act) and 2) Registration of 080 opt-out number (compliance with the Act on Promotion of Information and Communications Network Utilization and Information Protection).

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{% stepper %}
{% step %}
**Pre-Registration of Sender Number**

{% hint style="info" %}
To comply with regulations related to the Telecommunications Business Act, identity verification of the sender number owner and document review are required when registering a sender number.
{% endhint %}

1. If you do not yet have a business sender number, you first need to activate a sender number through a telecommunications carrier.
2. Visit the Hackle Dashboard under Settings > External Integration > CRM Integration > Settings tab to complete identity verification for the first time. A mobile phone registered under the name of the person responsible for this task is required.

   ![Initial identity verification](/files/SojrUeAiusIY5lqGPiF4)
3. After completing identity verification, proceed with additional identity verification at Settings > External Integration > CRM Integration > Text Message tab. Identity verification must be done with a phone registered under the same name as the previous step. Then enter the sender number to register.

   **Acceptable sender number formats**

   * Landline phone number: 02-YYY-YYYY (register including area code)
   * Mobile phone number: 010-ABYY-YYYY
   * Representative phone number: 15YY, 16YY, 18YY (area code prohibited before number)
   * Common service identification number: 0N0 series (area code prohibited before number)
   * Sender numbers from a minimum of 8 digits to a maximum of 11 digits can be entered
   * Messages cannot be sent using non-existent number ranges (e.g.: 070-0YYY, 070-1YYY, 010-0YYY, 010-1YYY)

![Sender number registration](/files/zhGlzd3ws8ZtaMlhwymE)

4. After entering the sender number to register, click the Submit Documents button in that number's section to submit the required documents. Business registration certificate, employment certificate, telecommunications service usage certificate, and phone number usage consent form are required. Key notes per document are as follows:
   * Employment certificate: Only documents with a clearly marked issuance date and official stamp can be registered. The last 6 digits of the resident registration number must be masked (hidden).
   * Telecommunications service usage certificate: There must be no masked (hidden) portions in the number or company name, and only documents issued within the last 3 months can be registered. The issuance number, issuance date, issuing institution, and issuer must be verifiable in the certificate.

![Sender number registration document submission](/files/5bB0CnlY4Kmu6DZVROcN)

5. Once document submission is complete, the sender number will be activated after internal review of the sender number and submitted documents, provided there are no issues. When the sender number is activated, the number's status will change to 'In Use' and the text message menu in the Dashboard will be activated. If there are issues with the sender number or documents, you will be notified via email or other means.

   ![Sender number activation](/files/6qFCP1xuH5bI1HfDlHql)
   {% endstep %}

{% step %}
**080 Opt-Out Number Registration**

{% hint style="info" %}
In accordance with Article 50 of the Act on Promotion of Information and Communications Network Utilization and Information Protection, when sending commercial advertising information for profit purposes, the recipient's explicit prior consent must be obtained and mandatory disclosure requirements must be strictly followed.
{% endhint %}

1. Visit the Hackle Dashboard under Settings > External Integration > CRM Integration > Settings tab and click the 080 opt-out number application.

   ![080 opt-out number application](/files/3s4dmUmlHc4bd42XzW3j)
2. You must enter the business information and tax invoice issuance details required for new number issuance and pay the fee before the number is issued. If you need to register an 080 opt-out number previously issued by another vendor, please contact the Hackle team separately. In this case, please note that management of the opt-out list must be handled directly by the other vendor or the customer company.
3. After applying for the 080 opt-out number, it takes approximately 3\~4 days to receive the issued number. Since cancellation of the 080 opt-out number application cannot be done after submission and before issuance, please apply with care.
4. Once the 080 opt-out number is issued and registered, the number's status will change to 'In Use' and the 080 opt-out number will also be automatically selected in the Dashboard's text message section.

   ![080 opt-out number activation](/files/ZZDgjX6rBIo6gS7gxc1r)
   {% endstep %}
   {% endstepper %}


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