The XDA community came out against MIUI users and created an application that in a transparent (although the font does not suit me) a way, without the need to root the phone gives access to the hidden options on Xiaomi phones with the MIUI system.
XDA has created an application that allows access to hidden functions
The application can be downloaded from the official Play Store
Options that the application provides are hidden deep in the menu or called by entering the appropriate code, the application does it for us. In addition to the settings, the application also includes dozens of diagnostic tests of individual components of the smartphone. Screen, speakers, GPS, vibration, options are really a lot.
It also allows you to improve the operation of your smartphone, the ability to better personalize your preferences. You can deactivate system applications without any problem. Opt out of application optimization, battery saving. The options are also many, I recommend playing only to advanced users so that someone does not break something.
The app collects flattering reviews, it can help you and you.