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Index / Twilio Docs / API Reference / Error and Warning Dictionary / Error 21607

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Error Reference

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Error 21607

Error - 21607

The 'From' number is not a valid, SMS-capable Twilio number

While your account is in Trial mode, you can only send SMS messages from your free trial number, or the Twilio Sandbox Number. To remove this restriction, upgrade to a full account.

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