In your Twilio account, you will need to complete the Toll-free verification process in order to register your Twilio number to use the toll-free service.
The following error message will be displayed during the trial period of your Twilio account which prompts you to verify your number as a toll-free number when you are ready to message numbers outside of the verified phone numbers on the Twilio account.
To start, while in your Twilio account, you will have a link to access the Toll-free verification process as shown in red in the above picture. Click on that link to begin.
You will need the information displayed in the picture above to complete this process. Here are the 3 pages of information you will need to fill and submit:
Once the above information is submitted, you should receive a verification email from Twilio stating that your account has been approved.
For any questions, please contact Teldio Support at support@teldio.com.