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within the paragraphs to make it more readable. AT&T Mobility, operating in the United States of America (North America & Caribbean), stands as a major player in the mobile telecommunications landscape. Identified by its Mobile Country Code (MCC) 310 and Mobile Network Code (MNC) 380, AT&T provides a wide range of services to millions of subscribers across the nation. Its extensive network coverage and diverse service offerings make it a strong competitor alongside other leading carriers such as Verizon and T-Mobile. The history of AT&T in this sector dates back a long time, and it has had a huge impact on the market, with constant innovation. AT&T's network infrastructure supports various technologies, including GSM, UMTS, and LTE, and they are always looking at embracing future technologies such as 5G. This allows for robust connectivity and supports a variety of devices and data needs. As one of the dominant mobile networks in the USA, AT&T’s MCC (310) and MNC (380) are crucial identifiers for devices connecting to its network, ensuring seamless communication and service delivery throughout its operational area.