American T-Mobile is a class of mobile communication products leading supplier, but also the world's most extensive coverage of the radio operator. It currently has 43000000 users, employees more than 38000 people. T-Mobile provides Wi-Fi wireless network, Internet access covers including the airport, the airport club, a lot of places Starbucks Coffee house. Besides it provides radio products, also provides numerous well-known mobile phone products, mainly including: Samsung Galaxy S4, HTC, Apple, LG etc..