With rapid advances in wireless technology and mobile devices, we are seeing an interesting development in which some developing countries are moving faster than the developed ones. This is because in the developed world, there exist legacy systems of hardwired connectivity that hinders the adoption of the more flexible wireless systems. Hence many parts of the world that lagged behind in building the hardwired infrastructure because of the cost are bypassing that stage and leapfrogging into the newer, cheaper, and more flexible wireless forms.
For example, I went on a visit to Sri Lanka some time ago, before the use of mobile phones became widespread in the US. I was amazed to see that they were ubiquitous in that country, with so many people of lower socio-economic backgrounds, including street vendors, drivers of the three-wheeler taxis, and others all having cell phones. This was because landline phones were very hard to get and expensive and thus available to only a select few such as businesses and well-to-do people, so when mobile phone technology became available, those who had been shut out of having phones seized on the opportunity because they could easily get one. It is the same with electricity. Many rural parts of the world are going straight to solar-powered electricity generation because the cost of running power grids from generating stations to remote areas is so prohibitive.
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