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AT&T Mobility, operating in the United States of America (North America & Caribbean), is a major player in the US mobile market. Identified by Mobile Country Code (MCC) 313 and Mobile Network Code (MNC) 210, AT&T provides a wide range of cellular services across the nation. From bustling cities to remote rural areas, AT&T aims to keep its customers connected through its extensive network infrastructure. As one of the largest carriers, AT&T competes directly with Verizon and T-Mobile, constantly striving to offer improved coverage, faster data speeds, and innovative mobile solutions. AT&T's presence extends across all 50 states and territories, offering 4G LTE and 5G services where available. Historically, AT&T's network evolved from the original Bell System, giving it a long-standing presence within American telecommunications. Beyond basic voice and data services, AT&T also offers bundled packages including internet and television, further solidifying its presence in American households. Understanding the significance of MCC 313 and MNC 210 allows users to accurately identify and configure their devices on the AT&T Mobility network, making troubleshooting and network selection simpler.