[QC] Tu 12/4/2012, Quy khach co the mua them 50MB luu luong voi gia 10.000d/lan dang ky, bang cach soan tin +10 gui 191. Chuong trinh chi ap dung cho thue bao nhan duoc tin nhan nay. Chi tiet lien he 1818 (200d/phut). Tu choi tin nhan 199, soan TC gui 199