GN2 doesn't work internationally

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http://forums.androidcentral.com – Hi, I'm on a trip that takes me through France and Poland. In neither country does the GN2 connect to any carrier at all (the phone is an expensive brick in these locations). Before travelling I called Verizon customer service and they assured me the phone would just work. All I had to do is turn it on and make a call. I know the rates are expensive, but I only need it for emergencies (receiving a call from home or making a call home). I don't need a new SIM card or to root it. However, it doesn't work at all. Says "no connection", doesn't roam, can't connect to any local (HowTos)