Vivoz5 HD mobile phone is the default, how to turn it off by SMS?

You don't need to send text messages, you need to turn them off in the phone settings.

Open vivoz5 phone settings, select mobile data, select call voice settings, drop down, find a high-definition call at the bottom, turn off the button behind this and then turn it off.

VivoZ5 was officially released in Beijing on July 3, 20201. It uses a 6.38-inch AMOLED screen with a resolution of 2340 times 1080. The back three lenses are located in the upper left corner of the back and arranged vertically.