Oneplus 8 stuck in fastboot mode after trying to downgrade from A12 - OnePlus 8 Questions & Answers

I was on A12 beta1, so I decided to go back to older firmware, I unlocked my bootloader and wanted to flash fastboot rom. When I tried it it says "Flashing not allowed for Critical partition" and when I try command:
fastboot flashing unlock_critical
It says failed, device already unlocked.
So I gave up and wanted to try MSM Tool, downloaded it and after literally 2hrs of looking for a proper driver somehow got it to work and see my device in EDL mode, but when I start flash it says "Param Preload Fails".
I have no idea what should I try next, tried everything in past 3/4 hours.
Device stuck in Fastboot mode, no booting, bootloader unlocked, any suggestions are welcome..

Related

Can't unlock bootloader - boot to OS

Ehy guys im having some trouble with my OPO.
First of all i can't boot to the OS, it just stuck in bootloop, and recovery is not accessible, but i can use fastboot.
Ive already used the MSM8974 tool, but after the flash the device is still stuck in bootloop.
I can't even unlock the bootloader, if i try the fastboot command "fastboot oem unlock" it just reboot and nothing happens.
Do you have some advice to exit this situation?? Ty for the replies

Moto G5 Plus randomly shut down and bootloops after last update, possibly bricked???

I think the latest update is the cause of this. My phone randomly shut down and couldn't turn back on, just stuck on the Moto logo and reboots forever.
I tried unlocking bootloader but I can't since "Allow OEM Unlock" is not enabled.
I tried deleting cache and userdata through fastboot and I got the error "Formatting is not supported for filesystem with type 'raw'." Bricked?
Is there anything I can do...? I LOVE THIS PHONE.
After flashing a POTTER_NPN25.137-92_cid50 stock rom now it says
Your device didn't start up successfully. Use the Software Repair Assistant on computer to repair your device. Connect your device to your computer to get the Software Repair Assistant.
AP Fastboot Flash Mode (Secure)
ERROR: Failed to pass validaton, backup to fastboot
Boot up failed
What should I do? Did I not flash the right ROM for xt1687??? What should I do??

My phone keeps on booting to fastboot

Hi all. Need urgent help here. I tried flashing my phone following everything on one post i found for flashing(androidbiits[dot]com/root-oppo-realme-5-rmx1911-easily/). But something went wrong(I don't know what went wrong, I just followed everything step by step). My phone suddenly keeps on booting to fastboot mode. I tried entering recovery mode but it boots to fastboot mode instead. Need help
PS. I tried to reflash my phone with rmx1911 stock rom. But I noticed my device state is locked. I can't somehow unlock it with fastboot(fastboot flashing unlock). A bootloader unlock prompt appears on my phone and when I choose to unlock the bootloader, my phone just reboots back to fastboot mode with the device state still locked
Use msm tool and ofp file for realme 5 ..you have to flash whole rom again..and it can be flashed in phone state locked too
Give the following commands :
$ fastboot flashing unlock
Then flash TWRP
Then flash stock ROM by renaming .ozip to .zip via TWRP.
mine too ... is there anything I can fix
mine too ... is there anything I can fix
joniyesnoppa said:
mine too ... is there anything I can fix
Click to expand...
Click to collapse
Flash this file use command-
fastboot flash vbmeta vbmeta.img
---------- Post added at 08:24 PM ---------- Previous post was at 08:20 PM ----------
sumeetsk2 said:
Flash this file use command-
fastboot flash vbmeta vbmeta.img
Click to expand...
Click to collapse
bit.ly/383BPIp
Download and Flash this files
how do I enable fast charging 3.0 because charging defaults only to 1.4a even though redmi 3s can only 1.9ampere
Cant flash vbmeta.img ... Anyone? Help
limilnate1 said:
Hi all. Need urgent help here. I tried flashing my phone following everything on one post i found for flashing(androidbiits[dot]com/root-oppo-realme-5-rmx1911-easily/). But something went wrong(I don't know what went wrong, I just followed everything step by step). My phone suddenly keeps on booting to fastboot mode. I tried entering recovery mode but it boots to fastboot mode instead. Need help
PS. I tried to reflash my phone with rmx1911 stock rom. But I noticed my device state is locked. I can't somehow unlock it with fastboot(fastboot flashing unlock). A bootloader unlock prompt appears on my phone and when I choose to unlock the bootloader, my phone just reboots back to fastboot mode with the device state still locked
Click to expand...
Click to collapse
Mine to have the same issue....i think you should visit nearest realme service center for flashing stock rom
The Phone is unable to flash vbmeta beacuse the phone is in locked condition
There only one way "FLASH STOCK ROM"
Contact me +923358048675 whatsapp 100% remote service
limilnate1 said:
Hi all. Need urgent help here. I tried flashing my phone following everything on one post i found for flashing(androidbiits[dot]com/root-oppo-realme-5-rmx1911-easily/). But something went wrong(I don't know what went wrong, I just followed everything step by step). My phone suddenly keeps on booting to fastboot mode. I tried entering recovery mode but it boots to fastboot mode instead. Need help
PS. I tried to reflash my phone with rmx1911 stock rom. But I noticed my device state is locked. I can't somehow unlock it with fastboot(fastboot flashing unlock). A bootloader unlock prompt appears on my phone and when I choose to unlock the bootloader, my phone just reboots back to fastboot mode with the device state still locked
Click to expand...
Click to collapse
..
Realme has just release its flashtool to flash there ofp firmware through fastboot. Just try it. and post result.
Note: This require bootloader to unlock
Flashtool Link:
https://download.c.realme.com/flash/Flash_tool/realme_Flash_Tool.zip
Firmware Link:
https://combinefile.com/index.php?a=downloads&b=file&c=download&id=42977
not flashing
my realme 5 stuck in fastboot mode and bootloader is lock and vbmeta image want bootloader unlock
plz plz help me
stay home and staysafe friends

Stuck in EDL mode locked bootloader any way to flah rom?

Never unlocked or flashed a custom rom on my device since I got it a few years back so its always been on stock.
My phont turned off one night while I was using it aand sicne its been stuck in EDL mode.
Black screen won't boot etc.
Device Manager shows Qualcomm HD-USB QDLoader 9008
I tried diffrent roms and diffrent Mi Flash tools wioth no luck.
In the latest Mi flash I cant flash because of authorisation.
In previous versions I get Waiting for hello packet and Object referance not set to instance of object.
I tried the diffrent firehose files from online.
I am going to try Xiaomi.eu rom and see what happens.
But anyone had this before and can help me get the phone back up and running?
I had a custom ROM installed. One night I just typed "fastboot oem lock" without giving it much of a thought. Than, of course, the phone was bricked. It wouldn't boot and gave the error "The system was deleted" or something like this and since the bootloader was locked and all MiFlash couldn't flash.
The solution was simple. I just used Mi Unlock and it worked. The bootloader was unlocked again. I didn't think it would work.

Unable to unlock the bootloader

I've recently bricked my device trying to install LineageOS, long story short I had to use MSM Tool in order to flash a new, stock ROM. Since I did that I am unable to unlock the bootloader: everytime I do the phone bricks with this following Yellow message on the screen: "upgrade download failed please check your download flow is right". After that I have to use the MSM Tool again to unbrick the Yellow text.
Any ideata how I might unlock the bootloader? Aside from that, the phone works fine.
EDIT: I managed to fix this by OEM updating my device to Android 11 and *then* unlocking the bootloader. Another issue has arisen now, though: whenever I try to boot TWRP from fastboot, the phone reboots and gets stuck in the "Fastboot Mode" OnePlus logo screen. Would anyone know how to fix this, or maybe is there a way to root your phone without using a custom recovery?
Karellen11 said:
I've recently bricked my device trying to install LineageOS, long story short I had to use MSM Tool in order to flash a new, stock ROM. Since I did that I am unable to unlock the bootloader: everytime I do the phone bricks with this following Yellow message on the screen: "upgrade download failed please check your download flow is right". After that I have to use the MSM Tool again to unbrick the Yellow text.
Any ideata how I might unlock the bootloader? Aside from that, the phone works fine.
EDIT: I managed to fix this by OEM updating my device to Android 11 and *then* unlocking the bootloader. Another issue has arisen now, though: whenever I try to boot TWRP from fastboot, the phone reboots and gets stuck in the "Fastboot Mode" OnePlus logo screen. Would anyone know how to fix this, or maybe is there a way to root your phone without using a custom recovery?
Click to expand...
Click to collapse
Yes you can ,,install thru boot loader with ADB and fastboot CMD. First you need to extract the boot.img from your oos rom, patch it in magisk app, then put it in your adb folder and run the cmd " fastboot flash boot boot.img .

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