Question Graphene OS - switch back to Google OS

[yycDAAN]

I tried Graphene OS for the past week and decided to go back to original.

- bootloader is unlocked
- am using Android Flash TOOL from here https://flash.android.com/
- Removed non-stock key prior to proceeding with Flashing
- i got to FastBoot screen during the Flash and the browser provided the following warning : '' Your device is being used by another program'' and then the Flasing process stopped.

- Am now back at the main Google screen.
- I believe Graphene OS already removed from device.
- Trying to initialize Android Flash TOOL once again, i accept ADB / Grant access to ADB keys - device does not show up in the tool anymore to flash stock OS. (see attached screenshot)


When I'm stuck at the main Google screen, I decided to factory reset.
Turned device off > Pressed Volume down > highlight “Recovery mode.” > “Wipe data/factory reset” > After reset completed, pressed the Power button to select “Reboot system now.”

 

[yycDAAN]

 

[Tintin62]

Add new device ???? nothing ?.

What I always did with Google phones (family and friends who brought them to me to flash):
With the original ROM and before any manipulation
-go to developer mode + USB debugging + unlock bootloader.
-in fastboot, fastboot flashing unlock, reboot then reconfig of the phone.
-switch back to developer mode + USB debugging + USB connection to PC.
-adb reboot bootloader then adb kill-server (on the PC).
-connect to Android Flash Tool then do as if I was going to flash the original Rom (to make the phone recognized by Google) and stop the process before flashing.
I don't know if it's really useful to do all this but recently with 2 phones (Google 4A5G and Google 5 under GrapheneOS) putted back the ROM from Google before re-flashing on the 2 CalyxOS (support planned until January 2025) without any problem.
Last possibility for you, download the ROM factory, unzip it and launch the flash-all.bat in fastboot.

 

[NippleSauce]

Add new device ???? nothing ?.

What I always did with Google phones (family and friends who brought them to me to flash):
With the original ROM and before any manipulation
-go to developer mode + USB debugging + unlock bootloader.....

@yycDAAN This is the best solution: doing this stuff manually and not using a tool/site to automate things =).

But anyway, ensure that you have USB Debugging enabled. If you don't, then no image flashing will work manually or through sites that tackle it all for you - as they won't be able to detect the device (which appears to be your current problem).

 

[yycDAAN]

Thank you guys for taking the time to help - much appreciate it

got into Fastboot mode. Android Flash TOOL recognized device and was able to install the original OS . When i restart phone, get the warning page :
''Your device is corrupt. It can't be trusted and may not work properly'' . I click CONTINUE and everything loads normally.

Is there anything I can do to ensure that ''Your device is corrupt.'' page stop showing up on Boot ?


EDIT : appears once bootloader is Locked, screen disappears



Leaving Thread up for reference.