T-Mobile, operating in the United States of America (North America & Caribbean), is a major mobile network provider identified by its Mobile Country Code (MCC) of 310 and Mobile Network Code (MNC) of 240. As one of the "big three" wireless carriers in the US, alongside Verizon and AT&T, T-Mobile has significantly shaped the country's mobile landscape through its innovative strategies and competitive pricing. Known for its disruptive approach, T-Mobile has consistently challenged industry norms, notably with its "Un-carrier" initiatives, which eliminated contracts, overages, and early termination fees. This customer-centric focus, combined with aggressive network expansion, particularly in 5G technology, has allowed T-Mobile to gain substantial market share, battling head-to-head with its rivals for cellular supremacy across the USA. T-Mobile's network infrastructure covers a vast territory, providing services to millions of users and supports a wide array of devices and technologies.