What does the hd mark on the mobile phone mean? How to turn it off?

The HD icon of the mobile phone is HD call, and the closing method is as follows:

Tools: Huawei p40, HarmonyOS System 3.0, Settings.

1. Click the settings icon of your phone.

2. Click the notification and status bar options.

3. Click the notification option.

4. Turn off the switch after the HD call, and the HD logo on the top of the mobile phone can be successfully removed.

Introduction to HD call

The HD calling function is a free upgrade of ordinary telephone service. Like making phone calls, sending text messages and other functions, it is a free basic service function that mobile phone numbers automatically enjoy, and no function fee is charged. High-definition voice can make users speak more clearly and dial faster when making phone calls. If they often use their mobile phones to surf the Internet, they can also surf the Internet while making phone calls without interfering with each other.

Some operators can only provide HD call support for certain cities or area codes. Please contact your operator for information about your region and account. You may need a new SIM card to use the HD calling function.