HAM radio is very inexpensive, it is nearly unlimited and free to use. The only limitation is that you can only talk for five minutes to any given person because the station gets out of range within that time.
It has to be an actress like Marion Cotillard [in Allied] because there are so many levels to it. It's set in the Second World War, when lots of people were doing things that, outside of a war, you wouldn't do, like killing and dropping bombs. She's doing things that one wouldn't approve of, but it's war.