With the vast development of technology, mobile phones have been deeply integrated into our daily life and become an indispensable part of our lives. And in this daily use of mobile phones, boot sound, that is a very ordinary function. However, for some users, the boot sound can be a nuisance that is hard to ignore. If you think it's too harsh and want to mute it, but don't know where to start, you've come to the right place. 
First of all, let's take a look at how to turn off the boot sound of Xiaomi phones through the system's settings. First, find the "Settings" icon on your phone's desktop and tap to enter. In the settings screen, find and scroll down to the "Sound & Vibration" option, then click to enter. In the "Sound & Vibration" interface, you'll find the "Boot Sound" option, just turn it off. 
Secondly, you can also use third-party tools to achieve the same purpose. In the Mi App Store or other app market** and install a third-party tool for your Xiaomi phone. Then open this installed third-party tool on your phone, find the "boot sound" or similar option in the tool, and turn it off. However, it is important to note that using a third-party tool may have a certain impact on the system stability of your phone, so make sure you understand its features and risks before using it, and back up your phone's data if necessary. 
Finally, for some advanced users, they may choose to turn off the boot sound by flashing or getting root access. Before any flashing or rooting operation, be sure to back up your phone's data in case something unexpected happens. Then Xiaomi official**or other reliable*** and install the flashing tool or root tool for Xiaomi phone. Follow the instructions of the flashing tool or root tool to get root access or do a flashing operation.
However, please note that this action may have an impact on the system stability and warranty of the phone. Therefore, it is important to understand the risks involved and exercise caution before proceeding. Once you're done flashing or rooting, you can go to the system settings or related file directory to find the boot sound option and turn it off. However, it should also be noted that flashing or rooting is risky, so if you are not familiar with the relevant operations or are not sure how to do it, please do not try it at will. It is advisable to do it under the guidance of a professional or seek official support.
In general, there are still many ways to turn off the boot sound of Xiaomi mobile phones, and users can choose the appropriate method to operate according to their own needs and actual conditions. No matter which method you use, you need to pay attention to the risks and precautions during operation to ensure the stability and safety of your phone.