Prepaid cards GIs use to call home yield a fraction of advertised time FORWARD OPERATING BASE SPEICHER, Iraq -- There are many things soldiers assigned to this dusty outpost near Tikrit could complain about. Long hours. Bad food. And jobs that can be deadly. But ask what bothers them most, and the answer might surprise you. "The phone cards are a rip-off, I don't know how else to say it," said Spc. Stephen Wade, 25, of Los Angeles, a member of the New Jersey National Guard's 50th Main Support Battalion stationed at the base. "I get the feeling someone is...