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Shapefile
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Utilities and Communication
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Princeton
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2013
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1. Global 2G mobile coverage, 2013
2013. Collins Bartholomew Ltd. Representation of the area covered by GSM (2G) mobile communications around the world as of December 2013.
2. Global 3G mobile coverage, 2013
2013. Collins Bartholomew Ltd. Representation of the area covered by 3G mobile communications around the world as of December 2013.
3. Global 4G mobile coverage, 2013
2013. Collins Bartholomew Ltd. Representation of the area covered by 4G mobile communications around the world as of December 2013.