I used to include in my teaching just a few years ago that, notwithstanding all the undoubted improvements in the technology of mobile telecommunications, still 50% of the world’s population had never actually made a phone call. This situation has now completely changed since the diffusion of mobile telephones, their reduction in size and cost has meant that their penetration into just about every country in the world has been complete. Migrant workers, for
example, use the mobile phone in the millions as an invaluable link to home and family – in many cases, it is just about the only personal item of any value that they own.
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