Roy Tang

Programmer, engineer, scientist, critic, gamer, dreamer, and kid-at-heart.

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An excerpt from a study about sim card registration (http://www.gsma.com/publicpolicy/wp-content/uploads/2013/11/GSMA_White-Paper_Mandatory-Registration-of-Prepaid-SIM-Users_32pgWEBv3.pdf)

An excerpt from a study about sim card registration (http://www.gsma.com/publicpolicy/wp-content/uploads/2013/11/GSMA_White-Paper_Mandatory-Registration-of-Prepaid-SIM-Users_32pgWEBv3.pdf)