How unlock bootloader on OPPO devices? - General Questions and Answers

Ok, I know that the in-depth test does not work on OPPO and fastboot is blocked, but I wonder if it is possible to take stock recovery and somehow enable the bootloader?

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Want to Relock Bootloader

Hi, I have the T-Mobile H830 Variant. I'm try to relock my bootloader because I have to take it back soon. I've already fully Unrooted my device but my bootloader is still unlock. I was wondering did anyone know of any way possible to relock the bootloader. It would be much appreciated if someone could point me in the right direction. Thanks in advance!
I'm wondering the samething. Might have to do it the same way you unlocked it. I used fastboot to unlock the bootloader. How did you unroot it.
Boot to fastboot mode then thru an adb shell, type the following: fastboot oem lock
Note this will erase your entire device.

Unable to unlock Bootloader of Meizu m6 m711h

I have meizu m6 m711h with:
Android 7.0
Flyme 7.1.2.0G
I am trying to unlock its bootloader but adb is not recognize the device.
Tried with different drivers pdaNet method as well but no success.
Can someone guide me how to unlock the bootloader ? Want to install a good custom rom in my phone.
Update:
I have managed to boot into fast boot mode now adb is recogaizig the phone and fastboot as well but, when I use fasboot oem unlock it does not work.
online tutorials says I should find OEM Unlock option in developer options to make fastboot oem unlock work but there is no such option in developer options.
Hi!Yes,I'm late,but want to say that we can't unlock bootloader on this device. Company"Meizu" don't give this opportunity. Many users from other forums have tried to unlock,but all attempts have failed. OEM Unlock option is absent.

Please help me make my phone work properly

This is the case, I have a problem with the Flash ROM, now the phone can go into fastboot, but there is no Recovery, and the phone's bootloader is locked.
You're going to have to give a bit more detail if you want help from this community.
For example:
What phone variant do you have?
What did you have on your phone when it was running properly? i.e stock android, locked bootloader, rooted etc.
What 'Flash ROM" do you mean a factory image or custom ROM?
What had been trying to do to your phone i.e upgrade from Android 9 to 10 by sideloading an image?
Had you previously unlocked the bootloader?
I'm not saying that I will ultimately be able to resolve your issues but the more info you give the more likely someone here will.
Now,my pixel 3 can not work,the bootload is locked.when I select recovery by fastboot,The phone noticed me can not find vaild operating system,the device will not start.
I used to unlock the bootloader, it is because I locked the bootloader that this situation has occurred.
Can you unlock the bootloader again in fastboot?
wangdaning said:
Can you unlock the bootloader again in fastboot?
Click to expand...
Click to collapse
When I lock my devices bootload,then this devices auto wipe data, so I think oem unlock is not open.And I can not unlock bootload.

TWRP / Unlock Bootloader on Cubot P30 (MT6763V)

Hi guys,
im looking forward to unlock the bootloader on my Cubot P30.
The phone is responding in USB debugging moder over the shell, for example when I´m typing "adb devices" or "fastboot reboot bootloader".
But in fastboot afer restart the device unfortunately doesn´t respond.
I even dont really know if the Bootloader is locked or not. The OEM Unlock slider under developer settings is set.
Furthermore The Recovery menu is in chinese, so i also dont know if there is a chance to doublecheck.
I tried flashing an Image over the Shell in case the booloader is unlocked but without success.
Also I cant´t find TWRP for this device, it seems there is no support for Cubot P30, isn´t it.
Hope there is a chance to update the device to Android 10 or Lineage, thanks in advance.
Update: The device is now unlocked. I flashed the Lineage 17.1 and unfortunately the device is still rebooting. Has somone a working image for this device?
Hello, how do you unlock your phone?
Mine Is P40 and same issue.
So if you tell me the way i really appriciate.
Thank you.
Unlock Bootloader & Root Android
Flashing process
1. Unlock Bootloader on Android Devices:
getdroidtips.com/unlock-bootloader-via-fastboot-on-android
2. Install custom recovery:
twrp.me/Devices
3. Root [Download & install supersu.zip via twrp, or root using magisk]:
getdroidtips.com/root-ulefone-power-6

zte a7 blade 2019 instant switch to os from fastboot*

Hi, i am loading booting to bootloader from adb with commnad (adb reboot bootloader) this isnt working, only restart its instantly switch to normal os, any ideas ?
Run
Code:
adb reboot
or
Code:
fastboot reboot
oh sorry man, i am idiot, and i am say it wrong.. I trying boot to fastboot but not working instantly switch to os, any ideas please ?
Unlock bootloader if not done yet.
where i unlock bootloader ? In developer settings ? (i have unlocked)
Enabling OEM Unlock in Developer options doesn't unlock the bootlader, it simply prepares the bootloader to get unlocked via fastboot command.
More info here:
How to Unlock Bootloader via Fastboot on Android
Unlocking the bootloader via Fastboot is the easiest thing to do. But not all Android devices support straightforward bootloader unlocking. Many manufacturers put up a setup on their devices to let…
nerdschalk.com
xXx yYy said:
Enabling OEM Unlock in Developer options doesn't unlock the bootlader, it simply prepares the bootloader to get unlocked via fastboot command.
More info here:
How to Unlock Bootloader via Fastboot on Android
Unlocking the bootloader via Fastboot is the easiest thing to do. But not all Android devices support straightforward bootloader unlocking. Many manufacturers put up a setup on their devices to let…
nerdschalk.com
Click to expand...
Click to collapse
Only I have a small problem I don't unlock my bootloader via fastboot when it doesn't work :/ It immediately jumps to my system when I boot fastboot, even with a command like ,,adb reboot fastboot"
Matyas66055 said:
Only I have a small problem I don't unlock my bootloader via fastboot when it doesn't work :/ It immediately jumps to my system when I boot fastboot, even with a command like ,,adb reboot fastboot"
Click to expand...
Click to collapse
I have new thread, where i am writing all info :/ https://forum.xda-developers.com/t/zte-blade-a7-2019-fastboot-mode-missing.4462035/
I don't know if you are still interested in accessing Fastboot but you can access it using a specific firmware version.
Still, let me tell you that unlocking the bootloader is virtually impossible. Since the well-known generic method doesn't work for the SoC SC9863A, you need to have a special Fastboot's program version and a dedicated private key that only they provide.... and I emphasize the word "dedicated" since apparently ZTE did not use a generic key to sign their ROMS. At least on this device.
Unless they decide to release the key or give support to unlocking the bootloader, all we can do is wait for them to change their minds. Because they don't want to provide it. I know because I tried to order it several times.

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