I'll still don't think your expectations for a single phone, be it Samsung or any manufacturer, to work in every country is very practical. There are just way too many different cellular networks that require different hardware radios for any single phone to be compatible with them all. Also keep in mind your situation is a unique one as most of the world's population will use their phones much more locally, with with only a few carriers that do have contractual compatibility with carriers in other nations when they both use the same type of cellular network.. Phone manufacturers target their primary market to sell product that meets the needs of the majority of consumers -- making a phone a truly universal one, with it's greatly increased number of internal components, would result in an expensive to make model that's quite sizable and hefty, and most significantly would only be appealing to a very small number of buyers. Phone manufacturers are in business to make money so mass production is the norm to fit the economies of scale, and while it would be nice if they did make phones in a hand-crafted, tailor-made process, that's just not the world we live in.