Why can't Xiaomi's ringtone be adjusted?

A please back up your data, enter recovery mode, clear cache, clear user data and clear all data. When restoring the backup, do not restore the settings and third-party security software in the mobile phone. Try to use it normally.

B. If it still doesn't work, I suggest you brush the whole package again with a wire brush according to the following methods. You can refer to the following brushing tutorial:

A. First, you download a MIUI line brush package suitable for your model in Xiaomi official website. This is the link:/topic-mirom.html.

B. During downloading, please back up data, enter recovery (shutdown, press and hold the volume increase+power on key to enter recovery), and clear the cache, user data and all data. Install the computer driver and download a miflash brush tool. This is the driver installation link of Mi11s series: /thread-504332- 1.html.

Thread-3104435-1-1.html of/m2 series.

D. If you are not familiar with brushing, you can refer to the brushing video tutorial made of rice flour:/v _ show/id _ xnteymjq1mzi4.html.

A more detailed description of the problem will help netizens understand your troubles and help you solve the problem more accurately. Thank you for supporting Xiaomi mobile phone!