You tried to flash/root the Note 4X and failed. As a result, the phone becomes dead boot and can't turn on at all. Trying to enter Fastboot and EDL Mode using Deep Flash Cable did not work.
When the firmware update process Xiaomi Redmi 3S to be completed, the error message dummy bin not found appears in XiaoMi Flash Tool. Based on experience, the issue occurs if you use Fasboot ROM MIUI 8 Global Stable v184.108.40.206. Follow the step by step below to fix the dummy.bin not found problem.
Xiaomi officially locked the bootloader by reasoned to improve security system. Of course not all devices, only the latest. The impact, we can no longer flash device through fastboot. Another method to flash Xiaomi phones is through EDL Mode. But there are still many Xiaomi users who do not know how to get a device into EDL Mode, the reason is enter EDL Mode is more complicated than going to Fastboot. Sometimes special tools are needed.
One of the benefits of unlocking the bootloader is you can install Custom ROM or TWRP recovery via Fastboot Mode. There are two ways to unlock the bootloader, officially and unofficially. Officially, you must make an unlock request to Xiaomi Developer Team. Unofficially, we need a custom file like emmc_appsboot.mbn but be careful, changing the emmc_appsboot.mbn file can cause your device to be brick.
TWRP is a custom recovery that has many useful features for install custom, backup and restore data, file manager, etc. On this post I'll show you how to install TWRP on Xiaomi Redmi Note 4X Snapdragon.
The reason why to do the test point when smartphone Max Mi boot loop or hard brick but the bootloader is locked so can not flash through Fastboot Mode.
Xiaomi MI 4C hardbrick / softbrick? Can't enter Fastboot Mode or the bootloader is still locked? You can try flash device via Emergency Download Mode. In this video I use Deep Flash Cable to get EDL Mode and QS HS-USB QDLoader 9008 detected on Ports Windows Device Manager.
Droidboot like BIOS on Windows computer that allows you to access and set up your android system on Asus Zenfone C (Z007) at the most basic level such as hard reset, recovery, update firmware, wipe data and cache, etc. Suddenly, your device can not boot normally just showing a Asus or Intel logo in very a long time. Can not get into Droidboot using various key combinations.