Guam Telephone Authority

MVNOs sell their own SIMs and plans but run on Guam Telephone Authority's network rather than owning one.

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About Guam Telephone Authority

The Guam Telephone Authority (GTA), operating in Guam, a US territory in North America & Caribbean, is a major mobile network provider. Officially identified by the Mobile Country Code (MCC) 310, shared with the United States, and Mobile Network Code (MNC) 33, GTA offers a range of telecommunications services to residents and businesses on the island. As a key player in Guam's connectivity landscape, GTA competes with other mobile operators to deliver voice, data, and other services, contributing significantly to the island's communication infrastructure. GTA's presence is crucial for connecting Guamanians, allowing them to stay in touch with family, conduct business, and access information in an increasingly digital world. The 310 MCC designation underscores Guam's integration within the North American Numbering Plan and telecommunications standards. While other operators may exist on Guam, GTA, with its established infrastructure and services identified uniquely by MNC 33, plays a vital role in maintaining the island's connection to the wider world. As technology evolves, it's clear that GTA remains a crucial utility provider.

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