Realme C21Y HardBrick - It says USB Device is faulty but disappears after 2 seconds - I can't enter download mode

[Luuukie]

I corrupted my phone's root/system/etc files and when I restarted it, it wouldn't turn on and got stuck on the realme logo. i hold my phone vol+ and - and power key and when the realme logo comes up, i release the power key, i think download mode opens, but it usb device is faulty for 1-2 seconds and disappears immediately, meanwhile in device manager it shows unknown device for 1-2 seconds and disappears. After 10-15 seconds there is a usb connection sound but nothing happens. I can send adb commands but I have to confirm the confirmation window but I cant.

Please help me, how can I fix it?

 

[leanord]

@leanord when installing GSI, I flashed boot_r1.img from your Realme C21Y GSI installation guide, did you disable fastboot or something?

During the installation of the gsi, you must be in Fastboot, everything is written in the tutorial

 

[leanord]

SP Flash Tool doesn't see my device so I can't flash it. If you mean Fastboot, I can't get into it.

We have Unisoc, not mediatek or Qualcomm

 

[leanord]

Oh, this is a Unisoc.
I know a lot about Qualcomm, some about Mediatek and almost nothing about Unisoc.

Our device, it can not be unlocked in any way, we were able to find a bypass and install GSI, as well as flash root, there is also TWRP in closed access, this device is not just Unisoc

 

[Luuukie]

During the installation of the gsi, you must be in Fastboot, everything is written in the tutorial

I know, I already installed a lot of GSI through fastboot. I mean the boot_r1.img that we flashed in the fastbootd unlock process before installing GSI.

 

[Luuukie]

2 days ago I took it to a phone repairman, he couldn't do it. My problem is that my computer does not see the phone and shows it as faulty. In a message to 4PDA, when he disconnected the battery, the PC saw the phone and threw the software. I plugged the cable into the pc and phone, pressed and held the volume - and power key and the logo came up looking corrupted and after 2 seconds it turned off. And the red charging icon came up.

4PDA Message: https://4pda.to/forum/index.php?showtopic=1039089&view=findpost&p=119019119

I feel like the phone is very close to being fixed, can you please help?
@mvikrant97 @Renate @leanord

 

[mvikrant97]

2 days ago I took it to a phone repairman, he couldn't do it. My problem is that my computer does not see the phone and shows it as faulty. In a message to 4PDA, when he disconnected the battery, the PC saw the phone and threw the software. I plugged the cable into the pc and phone, pressed and held the volume - and power key and the logo came up looking corrupted and after 2 seconds it turned off. And the red charging icon came up.

4PDA Message: https://4pda.to/forum/index.php?showtopic=1039089&view=findpost&p=119019119

I feel like the phone is very close to being fixed, can you please help?
@mvikrant97 @Renate @leanord

Its great your phone connects in DIAG mode.
SPRD U2S Diag mode can be used to flash stock rom back to your device.

Find the stock rom for your phone online and flash it is using SPD FLash Tool which is for your device.

 

[Luuukie]

Its great your phone connects in DIAG mode.
SPRD U2S Diag mode can be used to flash stock rom back to your device.

Find the stock rom for your phone online and flash it is using SPD FLash Tool which is for your device.

Within 2 seconds it appears as unplugged and does not appear on the SPD.

 

[mvikrant97]

But Usb log view does show your phone.

So it's not connecting now?

Please hold the volume down button and then connect it to the computer.

Within 2 seconds it appears as unplugged and does not appear on the SPD.

 

[mvikrant97]

I have flashed this device before using UpgradeDownload - R26.21.2801 but I don't remember whether I pressed a key or not.

You can try flashing it to see if it fix you problem.

 

[Luuukie]

I have flashed this device before using UpgradeDownload - R26.21.2801 but I don't remember whether I pressed a key or not.

You can try flashing it to see if it fix you problem.
View attachment 5927049

It's not working, I guess the only solution is to take it to the service center...

 

[mvikrant97]

It's not working, I guess the only solution is to take it to the service center...

Please download the latest firmware and then flash it.
Latest one is RMX3261_11_A1.01_20230208211542.

Seach for realme c21y flash file on Google.

 

[Luuukie]

@leanord Can you share if you have an OFP or Scatter file for Realme C21Y?

 

[Luuukie]

I have a lot of PAC files now, A91, A97 and 101.

 

[Luuukie]

Please download the latest firmware and then flash it.
Latest one is RMX3261_11_A1.01_20230208211542.

Seach for realme c21y flash file on Google.
View attachment 5928603

I did what you said, but it doesn't show up in the program. Windows says the USB device is faulty.

 

[Luuukie]

That's it!! Thanks God! I fixed my phone after 1 month!
Previously it didn't see my fastboot device when installing GSI, so I applied a fix from xda forum (This), so I installed google usb driver again and it showed up in spd flash tool!

Thanks to everyone who helped me! @Renate @leanord

I want to give special thanks who invited me to flash again, Thank you @mvikrant97.