"division" is not the right term for it. They are really different companies, even though the majority owner is the same and they use similar branding. T-Mobile

"division" is not the right term for it. They are really different companies, even though the majority owner is the same and they use similar branding. T-Mobile US wasn't created by T-Mobile Germany expanding, but rather through Telekom buying US carriers and rebranding them, and thus they don't share infrastructure or corporate structures.