we are retired and spend 7 months in Pa. and 5 months in Fl and are looking for a phone service that we don't have to pay a monthy usage charge, because we only want the phone when on the highway, back and forth and in emergency situations, where the land phone might not be working. I have been looking at Tracfone, but am not sure that we can use it both places, as you have to list your area code where you would be using or buying it. Any suggestions?