After the Viettel has been successful in the countryside, the other networks at this search to this market. So they were slower than Viettel from a year and a half to two years. And at that, Viettel changed tactics, instead of investing in the countryside, they returned to the city for business, thanks to which the power between the operators completely changed. Of course, besides the identification of areas of local business, the original correctness; the success of the Viettel also must be based on existing resources and how to separate his business (marketing strategy, branding, advertising ...
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