- You must use a valid phone number.
- Short codes are not allowed on the WhatsApp platform.
- The number must include a country and area code.
- Landline and cell phone numbers are allowed.
- Since a phone number is tied to a WhatsApp account, you must own this number.
- Phone number must be able to receive international voice calls or SMS in order to complete registration.
- The phone number must also not have been used with the WhatsApp Business API before.