If the mobile phone can't be used normally due to system failure or has problems after self-brushing, it is recommended that you send the machine to the after-sales service center, and the engineer will help you check and handle it.
Supplement:
1, some third-party websites or forums provide brush packages, which are unstable and have compatibility problems due to the non-Samsung official original system. If you are not a professional, it is not recommended to try to brush the machine.
2. In order to make users have a better experience, Samsung mobile phone provides a system update service. If there is a new firmware, there will be a push update notification. The following operations can be performed: Setup-(about mobile phone/about equipment)-System update-automatic update-on.