Huawei can enter the engineering mode by pressing * # * # 2846579 # * * on the dial! Engineering mode is debugging mode, through which you can check the hardware information of the mobile phone, including screen model, camera model, hardware aging degree check, network function check (whether the mobile phone can use the network normally) and so on. , but also can restore the factory settings of the operating system and upgrade the system.
Background debugging is mainly used for engineers to debug the performance of mobile phones. If you are an ordinary user, it is not recommended to enter the background. Improper operation may lead to abnormal use of mobile phones.