You must use a valid phone number, and must include a country and area code. The phone number must be able to receive calls or SMS for account verification.
There are 3 types of eligible phone numbers:
- Cell phones – can be used as long as the number has not been used for WhatsApp in the last 6 months
- 1-800 or toll-free numbers – possible as long as the phone number is capable of receiving SMS or voice calls directly. You will not be able to use number that are behind IVR.
It must not have been used with any WhatsApp app before.
If it has been used on WhatsApp before, you must delete the account.
To delete your existing WhatsApp account, please refer this guide: https://clare-ai.zendesk.com/hc/en-us/articles/360035741612