AT&T

MVNOs sell their own SIMs and plans but run on AT&T's network rather than owning one.

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About AT&T

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 the Mobile Country Code (MCC) 310 and Mobile Network Code (MNC) 680, AT&T provides a wide range of cellular services to millions of subscribers across the country. As one of the "big three" alongside Verizon and T-Mobile, AT&T competes fiercely in terms of coverage, data speeds, and service offerings. Historically rooted in the legacy of Southwestern Bell, AT&T has continually evolved, embracing advancements like 5G technology to provide faster and more reliable connectivity to its users. AT&T's network footprint spans across urban and rural areas within the US, offering various plans to cater to diverse user needs, from basic voice and text options to comprehensive data packages. Their commitment to innovation is demonstrated through ongoing investments in network infrastructure and the rollout of new technologies & services. For users traveling abroad, AT&T provides options that allow for continued coverage and data connectivity across North America & Caribbean, and globally. Understanding network codes like MCC 310 and MNC 680 is crucial for identifying and troubleshooting network connectivity issues, especially when experiencing roaming or dealing with international usage.

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