Android 9 and lower: vol+vol- and connect USB cable.Select "Upgrade mode -> USB upgrade" from the menu that will appear. Android 10: Press and hold VOL+ and Power ON buttons.Connect the phone to PC using USB cable in Upgrade mode:.Select "HISILICON" platform from the tab menu in the upper left side of the software.Don't forget to write down for yourself original firmware version of the device.Use SD_update file type for the latest Android versions (Android 10.0.1, Android 10.1 and higher).You may use original FullOtaUpdate file from this website.You may take it from update_sd_base firmware folder.It must exactly match the smartphone’s firmware version: STEP 1: Prepare original update.app flash file No need to search for the schematics of testpoints. This feature allows setting the device to factory mode - HUAWEI USB COM 1.0 without disassembling the phone, and without connecting hardware testpoint to it.
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