The application that the brush machine can't solve the signature conflict. A signature conflict occurred when installing the application, which means that an application with the same package name but inconsistent signatures already exists on the device. This makes it impossible to install, update or run the application. One way to solve the signature conflict is to uninstall the conflicting application to clean the residual files on the device, and then reinstall the application. In some cases, you can also try to use a third-party application to manage and handle signature conflicts. Therefore, the brush operation itself will not directly solve the problem of signature conflict, because the brush operation mainly involves the replacement or update of the operating system, and will not specifically deal with the application program.