cell phones in casinos
I had suspected this. IE at the MGM Grand, where we stayed, my cell phone (Verizon) worked perfectly on the floor. Dealers generally didn't want cell conversations from an active player, but if my wife was "hunting me" I could step back from the table and talk, and at most tables I could talk while playing.
In the Beau in Biloxi my phone hardly works.
One thing for certain, they can _not_ jam signals. FCC would be pissed beyond belief for that. Of course, these things (Casinos/hotels) are huge, with lots of Rebar, wire mesh, pipes, wires, AC, and all sorts of other interference. If they don't want to help, they don't have to of course, but they certainly can't interfere with the signals. Also, my verizon phone is all digital. My brother's wife had an analog/digital phone and had better luck on the MS coast, probably due to more interference from all the slots with their microprocessors producing digital RF interference.