2018. Collins Bartholomew Ltd. Representation of the area covered by GSM (2G) mobile communications around the world as of December 2018.
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2020. Collins Bartholomew Ltd. Raster data representing the area covered by 2G mobile communications around the world as of February 2020.
2013. Collins Bartholomew Ltd. Points representing GSM (2G) mobile network operators within particular countries as of December 2013.
2014. Collins Bartholomew Ltd. Points representing GSM (2G) mobile network operators within particular countries as of December 2014.
2015. Collins Bartholomew Ltd. Points representing GSM (2G) mobile network operators within particular countries as of December 2015.
2016. Collins Bartholomew Ltd. Points representing GSM (2G) mobile network operators within particular countries as of December 2016.
2017. Collins Bartholomew Ltd. Points representing GSM (2G) mobile network operators within particular countries as of December 2017.
2018. Collins Bartholomew Ltd. Points representing GSM (2G) mobile network operators within particular countries as of December 2018.
2007. Collins Bartholomew Ltd. Representation of the area covered by 3G mobile communications around the world as of first quarter 2007.
2008. Collins Bartholomew Ltd. Representation of the area covered by 3G mobile communications around the world as of first quarter 2008.