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You searched for: Subject Utilities and Communication Remove constraint Subject: Utilities and Communication Institution Princeton Remove constraint Institution: Princeton Year 2011 Remove constraint Year: 2011
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1. Global 2G mobile coverage, 2011

2011. Collins Bartholomew Ltd. Representation of the area covered by GSM (2G) mobile communications around the world as of December 2011.

2. Global 3G mobile coverage, 2011

2011. Collins Bartholomew Ltd. Representation of the area covered by 3G mobile communications around the world as of December 2011.

3. Global 4G mobile coverage, 2011

2011. Collins Bartholomew Ltd. Representation of the area covered by 4G mobile communications around the world as of December 2011.

4. U.S. Telephone Area Code Boundaries, 2013

2011. TomTom North America, Inc. U.S. Telephone Area Code Boundaries represents the telephone area codes for the United States. They are also known as Numbering Plan Areas (NPA). T...