On December 29, 2023, MIC of Vietnam posted the circular 20/2023/TT-BTTTT. The circular approves new standard QCVN 117:2023/BTTTT for GSM, W-CDMA, UTRA Land Mobile User Equipment. The new main points of QCVN 117:2023/BTTTT are as follows: 1. VoLTE is mandatory 2. Additional LTE bands: 1) LTE B28: 703MHz – 733MHz / 758MHz – 788MHz 2) LTE B40: 2300MHz – 2400MHz 3) LTE B41: 2500MHz ~ 2690MHz The ci..