co may sim 10 so viettel can ban: 966.959.955(1tr), 966.988.811(1tr), 969.759.333(1,2tr), 985.45.1599(250k), 988.04.98.04(1tr), 978.052.226(250k - tk 50k), 984.026.444(350k), 963.72.2882(500k - tk200k)