We have a previous number that we're using for a client for testing purposes. After client wants to actually use a new number, we immediately disconnect the old number attached to his assistant. Fast forward to today, we will going to use that same old number for our own assistant but when importing it, we've received an error (see attached image) @Vapi Support Bot https://cdn.discordapp.com/attachments/1421166410532520109/1421166411539021865/image.png?ex=68d80bdc&is=68d6ba5c&hm=3f22c3c893a00efe4ea3b6de7872664ad16acede92b01476ce78fa5552c6270a&

Suggestion: The "Twilio Error: Authenticate" message usually means your Twilio credentials are incorrect or outdated. Make sure you are using your Twilio API Key and API Secret (not the Auth Token) when importing the number into Vapi. - In your Twilio Console, go to API Keys & Tokens and copy your API Key and API Secret. - Enter these credentials in the Vapi import form. Example:

Twilio API Key: SKxxxxxxxxxxxxxxxxxxxx
Twilio API Secret: [your secret here]

Try re-importing the number with these credentials. [See the documentation for more details](https://docs.vapi.ai/changelog/2025/4/27). Source: - [Changelog](https://docs.vapi.ai/changelog/2025/4/27)

Hi LB_D, If you need assistance with importing a Twilio number into Vapi, you can follow these steps: 1. Acquire a Twilio Number: If you don't already have a Twilio number, purchase one from the “Buy a Number” section in the Twilio console. 2. Retrieve Twilio Credentials: In your Twilio console, locate your Account SID and Auth Token under “API keys & tokens”. 3. Import into Vapi: - Navigate to the “Phone Numbers” section in your Vapi dashboard. - Click “Import”. - Enter your phone number along with your Twilio Account SID and Auth Token. - Click “Import” again to complete the process. For further details, you can refer to the [Import number from Twilio guide](https://docs.vapi.ai/phone-numbers/import-twilio). This should configure your Twilio number for use with Vapi for both inbound and outbound calls. If this doesn’t resolve the issue, please let us know and we’ll be happy to step in and assist further.

UPDATE: So the error is we just need to top-up the credits. This post is now solved, thank you.

Thank you, please let us know if you need further help.