Trung Tam Thuong Mai Viettel Son La- Chi Nhanh Tap Doan Vien Thong Quan Doi Address: No 1, Chu Van Thinh Street, Civil Group 1, To Hieu Ward, Son La City, Son La Province Enterprise code: 0100109106-006 Phone: 0983636663 Representative: Bui An Khang To Hieu Ward, Son La City, Son La ProvinceFounding date: 3 - 4 - 2012