That's because T-Mobile US is an underdog in the US and is barely related to the international T-Mobile brand. T-Mobile US was an independent company named Voi

That's because T-Mobile US is an underdog in the US and is barely related to the international T-Mobile brand. T-Mobile US was an independent company named VoiceStream Wireless until it was purchased by Deutsche Telekom in 2001. It continued (and continues) to run as an independent subsidiary with its own CEO and board of directors. After purchasing TMUS DT neglected to invest in them for capital improvements (spectrum purchases and equipment upgrades) and they fell further and further behind the competition (at its worst they were 4th out of 4 with 33 million customers[1] to #3 Sprint's 55 million[2] and #1 Verizon's 92 million[3]) until DT tried to dump TMUS in 2011 by selling it off to AT&T. The only reason T-Mobile US is competitive today is because the FCC blocked the merger and AT&T had to pay a substantial "break-up fee" in the form of $3 billion in cash and $1 billion in wireless spectrum (which is worth substantially more today). [1]http://www.tmonews.com/2012/02/t-mobile-announces-fourth-quarter-2011-financial-results-lte-network-coming-in-2013/ http://www.tmonews.com/2012/02/t-mobile-announces-fourth-qua... [2]http://newsroom.sprint.com/news-releases/sprint-nextel-reports-fourth-quarter-and-full-year-2011-results.htm http://newsroom.sprint.com/news-releases/sprint-nextel-repor... [3] https://www.verizon.com/about/news/press-releases/verizon-reports-record-revenue-growth-4q-fueled-strong-demand-wireless-fios-and https://www.verizon.com/about/news/press-releases/verizon-re...