Deutsche Telekom merged its T-Mobile USA unit with prepaid specialist MetroPCS in 2013, and that firm merged with Sprint in 2020, creating the second-largest wireless carrier in the US. T-Mobile now serves 80 million postpaid and 25 million prepaid phone customers, equal to around 30% of the US retail wireless market. The firm entered the fixed-wireless broadband market aggressively in 2021 and now serves 7 million residential and business customers. In addition, T-Mobile provides wholesale services to resellers.