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Starting on October 19, T-Mobile will be extending its unlimited high-speed data abroad when traveling overseas. T-Mobile started doing this in Brazil this summer, where the city of Rio flocked hundreds of thousands of people to watch the Olympic Games. T-Mobile made it easy for customers when it announced that it was going to let customers use unlimited high-speed data while roaming in Brazil, free of charge. Normally, T-Mobile offers free roaming data to over 140 countries and destinations, however that internet speed is at about 2G speeds, which is just enough to check emails, use...