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Xem thêm: Strategy on developing Viettel mobile network in the southwestern area and Ho Chi Minh City period of 2011-2015, Strategy on developing Viettel mobile network in the southwestern area and Ho Chi Minh City period of 2011-2015, CHAPETR 2. BUSINESS SCT OF VIETTEL BRANCHEXCUTIVE SUMMRY IN HO CHI MINH CITY AND SOUTHWESTERN PROVINCES, CHAPTER 3. STRATEGY ON DP VIETTEL MOBILE PHONES SERVICES IN HO CHI MINH CITY AND SOUTHWESTẺN PROVINCES IN 2010 - 2015