Yes! As long as you can collect a pin code verification delivered to it by SMS or Voice and provide it to Sinch within 10 minutes of receipt.
Note: It has a very short Expiry - Time to Live (TTL).
If you plan to use a phone number that you already own, you must make sure that the device having this phone number is not sitting behind an Interactive Voice Response (IVR) system, otherwise the number cannot be supported.
Learn more about the Sinch WhatsApp Business API.
