Samsung has started locking its Android smartphones, built after the end of July 2013, to their respective home continents. So far the new practice has been confirmed for Europe and America (read South, North and Central, including the Caribbean). Each device will come with a sticker in the retail package, indicating the region it can be used in. The information became public primarily...
Source: http://www.gsmarena.com/samsung_simlocking_droids_built_after_072013_to_continent-news-6866.php