The phone numbers management section of smrtPhone lives under the Admin menu.
In the phone numbers section you can:
View active phone numbers
Give them "friendly names" to make them easier to identify (Learn how, here>>)
Identify Call Flows the number is associated with. (Note: if this field is blank, when the number is dialed, nothing will happen. Make sure you have at least a basic call flow set for each number that identifies which user should get the incoming call.)
Swap Call Flows - Change the Call Flow from the phone number, rather than going to the Call Flow builder. Example use case: Holiday message that is needed for a short period of time - you can swap in and out.
See the capabilities of the number - voice calls, SMS texts, and/or MMS texts
Delete a number - When you remove a phone number, it is permanent in most cases, so be very sure!
Add new numbers - You can get a new number by clicking on the green "Buy a number" button. You can switch between Toll-Free and Local, or drill down on local area code, depending on what you need.