Xiaomi 12 How to set up an uninterrupted telephone network?

If the mobile phone terminal supports VOLTE high-definition voice function, Unicom customers of Unicom's 4G and above networks can edit the short message DGVOLTE and send it to 100 10 to activate VoLTE and enable this function. As far as the effect is concerned, compared with the traditional voice dialing method, it has the advantages of faster connection speed, better sound quality, clearer video call and Internet access.