Although you can add more numbers as virtual numbers. A virtual number can be free to "upgrade" to the second line.
These numbers could come from going through the process of LNP. If you wish a number be ported in as a virtual
number, but its likely best to contact support and to expect the additional cost of a second number.

From a test I see it should be $4.95 monthly, or $36.00 yearly if you simply add a number from VOIPo inventory.