1. Restart the device: sometimes the damage of the device certificate is a temporary problem, and restarting the device can solve it.
2. Restore the factory settings: Restarting cannot solve the problem, so you can try to restore the factory settings of the equipment. Please note that this will delete all data on the device, including applications, settings and personal files. Be sure to back up important data before performing this operation.
3. Contact the after-sales or maintenance center: The above methods cannot solve the problem. It is suggested that you contact Huawei's after-sales support or maintenance center, consult them and get professional technical support. They will provide more specific solutions or suggestions for further maintenance. Huawei HarmonyOS System is a full-scene distributed operating system independently developed by Huawei. It aims to provide all-round and unified operating system solutions for all kinds of intelligent devices, including smart phones, tablet computers, smart watches, televisions, automotive embedded systems and so on.