You can add one number to a business straight away, even before that business is verified. Use it to build and test.
To add more than one number, the business needs to be verified.
Note: An unverified business's number can only message test recipients.

If the phone number you are adding is already registered as a personal Arattai account, adding it here will convert it into a platform account. Before you continue:
Back up your chats. Any chat that is not backed up is lost and cannot be recovered.
Hand over ownership in groups and channels. The number leaves every group and channel it is in. If it is the only owner or admin of a channel, assign someone else first, or that channel is left without one.
This action is not reversible.
Go to Numbers and select Add number. You can also use the Add number link against a business in the Business list.
Verify the number. Enter the phone number and select Send OTP, then enter the code you receive.
Link it to a business. Choose the company and the business this number belongs to, then confirm. A number belongs to exactly one business.
Set up the profile. Complete the profile your customers will see.
→ How to Set Up Your Number Profile