Here is an overview of all GSM and CDMA based cell phone networks and carriers including their signal frequency in the United States. Updated: October 30th, 2008.
USA GSM Networks & Carriers:
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Advantage Cellular Systems Inc (GSM 850)
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Airadigm Communications (GSM 1900)
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Alaska Wireless Communications, LLC (Dutch Harbor) (GSM 850)
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Alltel Communications Inc (GSM 850/1900)
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Arctic Slope Telephone Association Cooperative (Artic Slope Telephone Association Cooperative) (GSM 850)
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AT&T Mobility (3G 850/1900)
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C T Cube, LP (GSM 850)
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Caprock Cellular Limited Partnership (GSM 850)
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Cellular Properties, Inc (Cellular One of East Central Illinois) (GSM 850)
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Centennial Communications (GSM 850)
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CGKC&H No. 2 Rural Cellular LP (West Central Wireless) (GSM 850)
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Chariton Valley Communications Corporation Inc (Chariton Valley Communication Corporation) GSM 1900
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Choice Wireless LC (AmeriLink PCS) (GSM 1900)
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Cincinnati Bell Wireless (Cincinnati Bell Wireless – Cincinnati, OH) (GSM 1900)
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Commnet Wireless, LLC (GSM 850/1900)
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Convey Communications Inc. (GSM 1900)
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Cordova Wireless Communications Inc (3G 850)
……more
