Many friends want to turn off the "HD" function, but find that there is no option to turn it off in the phone. This article teaches you how to turn it off.
Method 1: Code Close
If the user has searched all the options in the phone and found that there is no HD turn-off option in the phone system, then you can open the dialing interface of the phone and enter the code "*#*#86583#*#*". It should be noted that the double quotes on both sides do not count, and the Chinese is "Xingjing Xingjing 86583 Jing Xingjing Xing". As shown in the figure below:
The code demonstrated in the article enters less one "star (*)" symbol. After the input is complete, the interface will automatically jump. However, based on the difference of the mobile phone, some mobile phones will not jump, but will be closed directly by default. Taking IQOO mobile phones as an example, the interface will jump as follows. As shown in the figure below:
Just turn off all options switches in the jumped interface. In addition, if the user wants to enable the function again, then repeat the code.
Method 2: Customer service phone
If the user thinks that the code is troublesome and based on the different mobile phone brands, the code may not necessarily work, then you can call the customer service number of the service provider to which the mobile phone number belongs. Taking China Unicom customer service as an example, directly call the customer service number to manual. As shown in the figure below:
Then tell the other party that you want to turn off the "HD" function of the phone, and the customer service will directly help the user turn it off.
Method 3: Other methods
Speaking of HD function, we have to mention the VoLTE technology of 4G network. The reason why mobile phones support HD function is closely related to the services provided by this technology. Some mobile phones do not have the option to turn off HD function, but they have the option to turn off VoLTE technology. As shown in the figure below:
Pay attention to the font of this option, marked as "4G". Only some 4G phones have this option. Turning it off directly is equivalent to turning off the HD function.
Conclusion: Generally speaking, it is not recommended to turn off the HD function. It mainly helps users make high-definition voice calls when using 4G networks. It is a technology unique to 4G networks. Moreover, with the popularization of 5G networks in China, this function is no longer used. However, based on the compatibility of 5G networks, users are not recommended to turn it off. Moreover, the HD function of the mobile phone is different from the HD services provided by the communication operator and cannot be confused.
Note: The mobile phone model used in the article is IQOO Z3, the mobile phone system version is Origin OS, and no App version is involved.
