I am truly in need of your assistance. I am traveling to Managua, Nicagua (Central America) and no retailer, nor information on the internet can tell me if this model phone can be used outside of the US in Central America? Most retailers do not offer a money back guarantee on this model phone, so I want to make sure I can use it in Central America before purchasing it, because if it does not work, I am stuck with a phone I don't need for use in the US, not to mention an unnecessary out of pocket expense. Thank You, Elizabeth Dixon dixon973497@bellsouth.net