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Collins Bartholomew Ltd.
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Princeton
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2014
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1. Global 2G mobile coverage, 2014
2014. Collins Bartholomew Ltd. Representation of the area covered by GSM (2G) mobile communications around the world as of December 2014.
2. Global 3G mobile coverage, 2014
2014. Collins Bartholomew Ltd. Representation of the area covered by 3G mobile communications around the world as of December 2014.
3. Global 3G mobile coverage, 2015
2014. Collins Bartholomew Ltd. Representation of the area covered by 3G mobile communications around the world as of December 2015.
4. Global 4G mobile coverage, 2014
2014. Collins Bartholomew Ltd. Representation of the area covered by 4G mobile communications around the world as of December 2014.