Does US use GSM or CDMA?

GSM networks are far more popular globally, but in the US, Verizon Wireless, a CDMA network , boasts the highest number of subscribers and broadest coverage in the country. International roaming: In your home market, it doesn’t matter what kind of network it is, with the focus instead on the available coverage.

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What is US GSM SIM?

A Global System for Mobile Communication Subscriber Identity Module , or GSM SIM card, is a SIM card that uses the GSM network. Having this card in an unlocked cell phone while using the correct frequency allows a cell phone user to use his cell phone in various countries all over the world.

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What are divisions for AT and T?

The Company is a provider of telecommunications, media and technology services globally. The Company operates through three segments: Communication segment, WarnerMedia segment, and Latin America segment . The Communications segment provides wireless and wireline telecom, video and broadband services to consumers.

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What is AT & T in communication?

AT&T Communications is a division of AT&T that focuses on mobile phone, broadband, fixed line telephone, home security, network security, and business services . The division houses AT&T Mobility, AT&T Internet, AT&T Phone, AT&T Labs, AT&T Digital Life, AT&T Cybersecurity, and DirecTV.

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