"Mick Ruthven" wrote:

What difference should it make what FSS you get on the cell phone for
closing a flight plan? 4F2 is an airport in Texas from wherever the FSS is
located.

Your flight plan has been forwarded to the FSS that serves your destination.
What do you think, that you can just call up any FSS in the country and have
them close your flight plan for you? This is the FAA we're talking about.