Video summary HERE
Go to “Settings” in the left navigation bar, select “Phone Numbers” out of the settings menu, and
click the green “New Number Wizard” button.
Enter a brief description of the number you will be adding, making sure to select whether or not this number will be assigned on the user level or campaign level, and hit "Next."
Enter the country and area code of the phone number you wish to use and hit "Search."
Make sure to agree by clicking “I Understand” box and click “Buy Number.” Note: Only buy numbers indicated by a green "Safe Caller" box under "OKCaller." This indicates numbers that have not been blocked or flagged for some reason.
Make sure to assign the number to a campaign or user(s), depending on what you selected in step one, and move on to complete.