[Q] How to Unlock BootLoader for Canvas A177 - Android Q&A, Help & Troubleshooting

I have a Micromax Canvas Juice A177.
Rooted successfully by FramaRoot.
I wanted to unlock the Bootloader but was unsuccessful in doing so.
Connected phone to pc and typed in adb
Code:
adb reboot-bootloader
So my phone rebooted into fastboot with a black screen and only "Fastboot mode.." on the screen.
i dont know what to do after that....
i tried
Code:
C:\android>fastboot oem unlock
...
FAILED (status read failed (Too many links))
finished. total time: 45.669s
As failed appeared i think it was not successful also i think that "fastboot oem unlock" only works for Nexus phones.
I need help. i want to unlock bootloader so that i can take a backup of my system.img etc directly on my pc.
Thanks in Advance.

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Soft Bricked, can access fastboot, bootloader locked

So I was trying to install one of the newer updates to my one plus since they haven't installed automatically since getting CM13, I ran fastboot oem unlock to unlock the bootloader, but I don't think this is actually unlocking my bootloader, here is my results - fastboot oem unlock
...
OKAY [ 0.014s]
finished. total time: 0.014s
when trying to flash recovery I get this annoying message -
FAILED (remote: Device not unlocked cannot flash or erase)
I'm using a mac so a lot of the guides aren't as easy to use for unbricking the phone.
Any help would be greatly appreciated.

Sony Xperia XZ: unlock bootloader FAILED (remote: Not necessary)

Hi Guys
I'm trying to root my device "Sony Xperia XZ (F8332)", and I have followed the steps in the develpoer.sonymobile.com, in the last step I faced this error:
..
..
C:..\sdk\platform-tools> fastboot devices
CB512CF1A4 fastboot
C:..\sdk\platform-tools> fastboot -i 0x0fce oem unlock 0x**********************
...
FAILED (remote: Not necessary)
finished. total time: 0.023s
Then turned on the device and then it did a reset factory, and I found the status for the OEM unlocking in the developer option says that the bootloader is already unlocked.
What does this error mean?
What I have to do to complete the root ?

Wiko U Feel Prime bootloader unlock failed (unknown command)

Dear all,
I have made numerous attempts to unlock the bootloader of my Wiko U Feel Prime, but to no avail.
(My goal is to flash TWRP, root with Magisk and install LineageOS.)
USB debugging and OEM unlocking are enabled in the developer settings.
ADB recognises the device. When I execute adb reboot bootloader, the device reboots, and doesn't get past the "powered by Android" screen – but is nonetheless found by fastboot when I run fastboot devices. Seems like the USB drivers are functioning properly, correct?
Now, when I run fastboot oem unlock, I get the following response:
Code:
...
FAILED (remote: unknown command)
finished. total time: -0.000s
The command fastboot flashing unlock gives the same result.
Moreover, fastboot getvar all displays no unlocked variable. The command fastboot getvar unlocked yields
Code:
unlocked:
By the way, this phone was shipped SIM unlocked.
I've spent hours looking around the web for solutions, but everyone (including guides specifically written for Wiko U Feel Prime) simply says "unlock the bootloader" as if it's a trivial task. And I've run out of ideas. Could anyone help?
Thank you very much.

Trying to unlock bootloader using Linux any help?

Hello there , i get my device recognised with : adb devices .
Then i restart to bootloader with adb reboot bootloader .
then i try to unlock the bootloader using this : sudo fastboot oem unlock
but the error i get is this : fastboot oem unlock
...
FAILED (command write failed (Protocol error))
finished. total time: 0.004s
any idea what i should do?
no ideas?

Question Trying to unlock Bootloader

Getting super frustrated!
Using ADB Debuging. Here are my steps.
1. adb devices
2. adb reboot bootloader
3.fastboot devices.
4. fastboot oem unlock
Then I get this...
FAILED (remote: unknown command)
finished. total time: 0.005s
after so many attempts I finally check adb devices and nothing shows up! It's like it automatically disconnects with adb debugging but it does not. Because I am able to to put fastboot reboot.
Can someone please help me with this! Thank you!
Use the fast boot command
Fastboot flashing unlock
Only this works on A12 devices
fastboot flashing unlock
oem unlock has been deprecated for awhile, manufacturers were just slow to implement changes.

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