1. This phenomenon is caused by the abnormal operations performed on the device, which affect the normal use of the activated device function. You are advised to go to the Huawei after-sales service store for check.
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2, can brush full package try.
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3, I heard that using the computer downgrade can be restored to normal.
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4, looking for repair mobile phone, to remove the machine brush machine, someone forced brush machine will return to normal.
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5, the chip is damaged: Your device chip is damaged and cannot be used normally, please go to Huawei official service store to obtain maintenance services, it is recommended to follow the prompts.