How does China Mobile's A 1S mobile phone turn on the high-definition video call VOLTE?

How to turn on VoLTE HD voice function on mobile phone;

Basic functions of mobile communication terminal to turn on VoLTE;

(1) after dialing 10086, select the manual service to turn on the basic communication function of VoLTE;

② Send the specified short message code to 10086 for opening (for example, Guangxi Mobile sends KTVoLTE to 10086 for opening);

(3) login to the mobile phone business hall (for example, after logging in to the mobile phone business hall, click VoLTE on the home page, and then choose to handle it immediately);

Set on the phone:

① Enter the mobile phone system settings and click Call Settings;

② Just turn on the VoLTE function in "Call Settings".

③ After setting is turned on, the "HD" icon will appear on the notification bar of the mobile phone under the 4G network.

④ Tip: The mobile phone that supports VoLTE by default does not need to be set, just turn on the VoLTE function.