How to open Unicom HD voice call?

2. After receiving the confirmation message, send VBNCDGFBDE；;

3. After receiving the confirmation message, send Y. ..

It is not enough to just turn it on, but also set it in the mobile phone.

Ps: At present, some provinces are slow to open. If the test can't be opened on the same day, you can wait two days and try again.

If the already opened users can't use it, wait for the system to remind operators to update the version.