Yes, a person can be fired through any communications mechanism. While it is certainly considered better to do it face to face, for some shift and hourly workers it is not possible.
You would use North Carolina since you would be technically be making your purchase in North Carolina.
The phone number of the Battleship North Carolina is: 910-251-5797.
The phone number of the North Carolina Zoo is: 336-879-7000.
The phone number of the North Carolina Pottery Center is: 336-873-8430.
The phone number of the North Carolina Museum Of History is: 919-807-7900.
The phone number of the North Carolina Aquarium Society is: 919-733-2290.
The phone number of the North Carolina Museum Of Forestry is: 910-914-4185.
The phone number of the Spirit Of North Carolina Llc is: 910-350-0265.
The phone number of the North Carolina Auto Racing is: 704-663-5331.
The phone number of the North Carolina Transportation Museum is: 704-636-2889.
The phone number of the North Carolina Executive Mansion is: 919-807-7950.
In and of itself, it is not illegal to fire someone over the phone.