T-Mobile, operating in the United States of America (within the North America & Caribbean region), is a major mobile network and is identified by the MCC (Mobile Country Code) 310 and MNC (Mobile Network Code) 220. The network has grown to become one of the largest in the US, often competing directly with Verizon and AT&T. Originally established as VoiceStream Wireless, T-Mobile USA was later acquired by Deutsche Telekom, giving it significant resources to expand its network infrastructure and offerings, meaning that the network now covers vast parts of the USA. Known for its disruptive marketing strategies, such as “Un-carrier” initiatives that eliminated contracts and overage charges, T-Mobile transformed the competitive landscape of the US mobile market. Beyond core mobile services like voice and data, T-Mobile also offers a variety of other consumer offerings, including internet access, and has invested heavily in 5G technology, aiming to provide widespread coverage and enhanced network speeds across the country. The network supports a vast range of cellular technologies too, including GSM, UMTS, LTE, and now New Radio via 5G.