mình đang su dung mang cua VNPT, gio minh muon chuyen sang lap mang Viettel thì khong biet goi cuoc ben Viettel co khuyen mai gi khong? Minh ben cty Vinagimex co lien he nhan vien lap dat dien thoai ,fax, cap Quang cho cty dia chi 112 Bau https://shop.viettel.vn/internet/all/dang-ky-goi-cap-quang-viettel-net5plus-tai-noi-thanh-ha-noi-de-nhan-uu-dai-hap-dan