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What is CSC Fastboot Mode, and how to get rid of it?

Android Enthusiasts Asked on December 6, 2021

I am trying to access my Zenfone Go’s fastboot in order to unlock its bootloader, but it seems to have been replaced with something called “CSC Fastboot mode”.

In this mode, I just see the ASUS logo, a “CSC Fastboot Mode!” text, and I am unable to enter any input. It looks like this:

https://i.ytimg.com/vi/fGvKbRoB8b0/maxresdefault.jpg

Since I cannot enter any input, most communication with fastboot.exe is impossible. I somehow managed to have fastboot.exe correctly detect the device, but any command that requires confirmation on the phone is impossible (ex: fastboot flashing unlock), fastboot.exe just waits forever. I tried inputting the commands on the phone anyway, in case there was an invisible menu or something, but didn’t work.

What I tried:

  • Turning off my phone, then “Power Button + Volume Up Button” until it restarts. It goes directly to CSC Fastboot Mode.

  • Turning off my phone, then “Power Button + Volume Down Button” until it restarts. It goes into Recovery Mode. Then I select “reboot to bootloader”. It goes to CSC Fastboot Mode.

  • Accessing my phone through adb, and using the “reboot-bootloader” command. It goes to CSC Fastboot Mode.

What is CSC Fastboot mode? What is it caused by? And how to reach a usable fastboot menu?

Model Number: ASUS_X013DB

Android Version: 5.1.1

Build Number: LMY47V.JP_Phone-13.0209.1705.116-20170621044040677_2015122901270020000400001

One Answer

  1. Install ADB and Fastboot tools in your PC (two tools as parts of Android Studio)

  2. Connect device through USB and open terminal/command prompt.

  3. In terminal/command prompt, type:

    fastboot devices
    fastboot continue
    fastboot reboot
    

Answered by Hung Doan on December 6, 2021

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