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11. Global 2G mobile coverage, 2018

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2018. Collins Bartholomew Ltd. Representation of the area covered by GSM (2G) mobile communications around the world as of December 2018.

12. Global 2G mobile coverage, 2020

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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.

13. Global 2G network operators, 2013

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2013. Collins Bartholomew Ltd. Points representing GSM (2G) mobile network operators within particular countries as of December 2013.

14. Global 2G network operators, 2014

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2014. Collins Bartholomew Ltd. Points representing GSM (2G) mobile network operators within particular countries as of December 2014.

15. Global 2G network operators, 2015

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2015. Collins Bartholomew Ltd. Points representing GSM (2G) mobile network operators within particular countries as of December 2015.

16. Global 2G network operators, 2016

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2016. Collins Bartholomew Ltd. Points representing GSM (2G) mobile network operators within particular countries as of December 2016.

17. Global 2G network operators, 2017

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2017. Collins Bartholomew Ltd. Points representing GSM (2G) mobile network operators within particular countries as of December 2017.

18. Global 2G network operators, 2018

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2018. Collins Bartholomew Ltd. Points representing GSM (2G) mobile network operators within particular countries as of December 2018.

19. Global 3G mobile coverage, 2007

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2007. Collins Bartholomew Ltd. Representation of the area covered by 3G mobile communications around the world as of first quarter 2007.

20. Global 3G mobile coverage, 2008

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2008. Collins Bartholomew Ltd. Representation of the area covered by 3G mobile communications around the world as of first quarter 2008.