Cingular works fine on Barren, Cumberland, Barkley and Kentucky. The only place I have fished that Cingular does not work is DALE HOLLOW and anywhere within about 8 miles of the lake. Big huge dead spot on the Cingular system and Verizon won't let them use the tower and until Cingular gets permission to put up a tower, Verizon is the only one to use at Dale.