No one who travels for work wants to have a cell phone that will only work in their country.  This is not a good phone for them as they may need to call back to an office or contact their family for many different reasons.  The best kind of cell phones for people who travel for work are GSM Cell Phones.  There are over 100 countries that have GSM service, and there are 217 international carriers in these countries that support GSM.  People who do not want to have to worry about their phone not working in another country need to think about getting a GSM cell phone.