How to active VoLTE in Mi A2 lite. Xiaomi MI A2 lite Dual 4G VoLTE Test. Fr Do You Know MI A2 lite support Duel VoLTE. Fr You can active Duel VoLTE same at a time. Many other phone VoLTE Signal show Directly but MI A2 lite show VoLTE signal as (HD) that mean MI A2 lite VoLTE signal. You get VoLTE signal in 4G network. VoLTE signal can not work on 3G. You get VoLTE signal need a 4G Sim