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[Q] wifi Xoom 3.1 unlocking bootloader error...

I've followed all the guides to a T. and my SDK is able to run nicely. However, once I've made contact w/ my device in 'usb debugging mode', tested the connection w/ "adb devices" in command prompt, and set the device to bootloader w/ the "adb reboot bootloader" command, and finally I give it the command to "fastboot oem unlock", I get an unknown error!! Please help. I have all the path variables set, and my SDK is running good, and has all the newest updates.
This is a link to a video I made of the problem. Please watch. It'll help if you can see the problem! just copy and paste - youtube.com/watch?v=2bROUZh7GRI
Thanks for your responses. I hope they come quickly!

V0nice said:
I've followed all the guides to a T. and my SDK is able to run nicely. However, once I've made contact w/ my device in 'usb debugging mode', tested the connection w/ "adb devices" in command prompt, and set the device to bootloader w/ the "adb reboot bootloader" command, and finally I give it the command to "fastboot oem unlock", I get an unknown error!! Please help. I have all the path variables set, and my SDK is running good, and has all the newest updates.
This is a link to a video I made of the problem. Please watch. It'll help if you can see the problem! just copy and paste - youtube.com/watch?v=2bROUZh7GRI
Thanks for your responses. I hope they come quickly!
Click to expand...
Click to collapse
Ok. I'm unlocked now. New problem... >.< There's always something!! now when I try to flash the recovery image, I get an unknown error.
"C:\AndroidSDK\tools>fastboot flash recovery recovery-Tiamat-R4c-100611-1150-cwm.
img
sending 'recovery' (3998 KB)...
FAILED (command write failed (Unknown error))
finished. total time: 0.636s
C:\AndroidSDK\tools>"
Anyone recognize why it would do this?

V0nice said:
Ok. I'm unlocked now. New problem... >.< There's always something!! now when I try to flash the recovery image, I get an unknown error.
"C:\AndroidSDK\tools>fastboot flash recovery recovery-Tiamat-R4c-100611-1150-cwm.
img
sending 'recovery' (3998 KB)...
FAILED (command write failed (Unknown error))
finished. total time: 0.636s
C:\AndroidSDK\tools>"
Anyone recognize why it would do this?
Click to expand...
Click to collapse
just copy and paste the command from the OP's instructions. I used the new Clockwork in the thread and just renamed it... which method are you using. I just did mine last Thursday with no issues. I used this method http://forum.xda-developers.com/showthread.php?t=1078019
HTML:
adb reboot bootloader
fastboot flash recovery recovery-Tiamat-R4c-100611-1150-cwm.img
fastboot reboot
Make sure you have the latest fastboot.exe and if all else fails start from the beginning again. Now you are sure your fastboot is unlocked....

playya said:
just copy and paste the command from the OP's instructions. I used the new Clockwork in the thread and just renamed it... which method are you using. I just did mine last Thursday with no issues. I used this method http://forum.xda-developers.com/showthread.php?t=1078019
HTML:
adb reboot bootloader
fastboot flash recovery recovery-Tiamat-R4c-100611-1150-cwm.img
fastboot reboot
Make sure you have the latest fastboot.exe and if all else fails start from the beginning again. Now you are sure your fastboot is unlocked....
Click to expand...
Click to collapse
I did just copy and paste it, and i got that error message.

V0nice said:
I did just copy and paste it, and i got that error message.
Click to expand...
Click to collapse
Did you try to do the fastboot unlock again

How did you manage to get unlock to work? Perhaps if you gave us more info on what you did?

Cannot flash another recovery please help

BACKGROUND INFO: I am trying to install color os rom using twrp recovery and it gives me "failed" when i flash it. I have heard that if you use CWM recovery it will work. i have installed TWRP recovery using toolbox that i downloaded from XDA. when i went back to toolbox to install CWM recovery it told me to boot into fastboot mode and I did. i also clicked attached devices under adb options and it gives my device number in CMD. when i select CWM recovery in toolbox and i hit flash it says make sure your device is in fastboot mode and i clicked ok. then it said within a few seconds your device will boot selected recovery and CMD pops up and it says FAILED. DEVICE NOT UNLOCKED CANNOT FLASH OR ERASE. i think this is because bootloader is locked but when i hit unlock boot loader in toolbox it says make sure your device is in fastboot mode and when i click ok, CMD pops for a second, then it closes and my device reboots immediately to TWRP recovery. also my device is ROOTED. i am able to install other ROMS such as mahdi and rom from OP. someone said that if i flash philz recovery.zip using TWRP recovery i will be able to install color os but still the same error. now i am stuck with philz recovery and i am unable to flash other recoveries. someone said that it is the oem lock and i went to CMD and typed fastoot oem unlock while my device was in fastboot mode and it said OK in cmd and the device booted right into philz recovery and still i am not able to flash another recovery. i went to CMD and typed fastboot oem device-info and it said device tempered- true, bootloader unlocked- false, charger screen enabled- false. I DONT KNOW IF ITS LOCKED BOOTLOADER, THAT I AM NOT ABLE TO UNLOCK, OR OEM LOCK, WHICH I TRIED TO UNLOCK AND IT SAID OK IN CMD, THAT IS NOT ENABLING ME TO FLASH BACK TO TWRP OR STOCK RECOVERY BECAUSE I HAVE MY ROM BACKUPS IN TWRP. PLEASE HELP ME TO GO BACK TO TWRP RECOVERY OR ANY RECOVERY.

Firstly, use paragraphs. Secondly, ditch the toolbox. Issue this fastboot command:
Code:
fastboot oem device-info
What's the output?
Transmitted via Bacon

timmaaa said:
Firstly, use paragraphs. Secondly, ditch the toolbox. Issue this fastboot command:
Code:
fastboot oem device-info
What's the output?
Transmitted via Bacon
Click to expand...
Click to collapse
device tempered- true, bootloader unlocked- false, charger screen enabled- false

Your bootloader is indeed locked. You can unlock it:
Code:
fastboot oem unlock
This will erase all user data on the device.
Transmitted via Bacon

timmaaa said:
Firstly, use paragraphs. Secondly, ditch the toolbox. Issue this fastboot command:
Code:
fastboot oem device-info
What's the output?
Transmitted via Bacon
Click to expand...
Click to collapse
Agreed with the paragraphs. OP did post the output of device-info in his OP post.
Calm down op, no need to use caps lock. Okay so anyways,
Do what timmaaa said, if that doesn't work try the following,
Do you have a copy of TWRP on your computer in the fastboot.exe folder? http://techerrata.com/browse/twrp2/bacon download 2.7.1.1
Go into fastboot mode, type in fastboot boot openrecovery-twrp-2.7.1.1-bacon.img
http://forum.xda-developers.com/oneplus-one/development/mod-reset-unlock-tamper-bit-t2820912
adb sideload that, then unlock your bootloader (fastboot oem unlock) in fastboot mode. then your phone will probably reboot, get into bootloader mode again then type fastboot flash recovery openrecovery-twrp-2.7.1.1-bacon.img and you will permanently flash twrp

timmaaa said:
Your bootloader is indeed locked. You can unlock it:
Code:
fastboot oem unlock
This will erase all user data on the device.
Transmitted via Bacon
Click to expand...
Click to collapse
i tried it nothing happens. the phone reboots into recovery and nothing erases. read my issue first. i already mentioned this. NOTHING HAPPENS WHEN I TYPE FASTBOOT OEM UNLOCK. IT SAYS OK. THEN THE PHONE BOOTS INTO RECOVERY AND NOTHING IS DELETED.

zephiK said:
Agreed with the paragraphs. OP did post the output of device-info in his OP post.
Calm down op, no need to use caps lock. Okay so anyways,
Do what timmaaa said, if that doesn't work try the following,
Do you have a copy of TWRP on your computer in the fastboot.exe folder? http://techerrata.com/browse/twrp2/bacon download 2.7.1.1
Go into fastboot mode, type in fastboot boot openrecovery-twrp-2.7.1.1-bacon.img
http://forum.xda-developers.com/oneplus-one/development/mod-reset-unlock-tamper-bit-t2820912
adb sideload that, then unlock your bootloader (fastboot oem unlock) in fastboot mode. then your phone will probably reboot, get into bootloader mode again then type fastboot flash recovery openrecovery-twrp-2.7.1.1-bacon.img and you will permanently flash twrp
Click to expand...
Click to collapse
when i flashed fastboot boot openrecovery-twrp-2.7.1.1-bacon.img it said ok in cmd and the device is still in fastboot mode and the logo of fastboot got more brighter. also what timaaaa said did not work. it said ok when i typed fastboot oem unlock in cmd and the device booted right to philz recovery and nothing got deleted.

zephiK said:
Agreed with the paragraphs. OP did post the output of device-info in his OP post.
Calm down op, no need to use caps lock. Okay so anyways,
Do what timmaaa said, if that doesn't work try the following,
Do you have a copy of TWRP on your computer in the fastboot.exe folder? http://techerrata.com/browse/twrp2/bacon download 2.7.1.1
Go into fastboot mode, type in fastboot boot openrecovery-twrp-2.7.1.1-bacon.img
http://forum.xda-developers.com/oneplus-one/development/mod-reset-unlock-tamper-bit-t2820912
adb sideload that, then unlock your bootloader (fastboot oem unlock) in fastboot mode. then your phone will probably reboot, get into bootloader mode again then type fastboot flash recovery openrecovery-twrp-2.7.1.1-bacon.img and you will permanently flash twrp
Click to expand...
Click to collapse
can you please explain me the steps in details. i downloaded 3 zip files that were in the link that you gave me. what should i do next? i found the steps confusing in the link.

My output is: device tempered- true, bootloader unlocked- true, charger screen enabled- false. Is it right? Thank you

MAX 94 said:
My output is: device tempered- true, bootloader unlocked- true, charger screen enabled- false. Is it right? Thank you
Click to expand...
Click to collapse
Yes. You are lucky dude. I can't unlock my bootloader.

So, I am the "lucky" one too
I did facktory reset and full wipe as I wanted to install back the CM11s, but I ended up in the "bricked" One :crying:
(bootloader) Device tampered: true
(bootloader) Device unlocked: false
The command: fastboot oem unlock
Reset One to the TWRP, but it does not unlock it
Any falstboot command ends up with: Device not unlocked cannot flash or erase
I already playing with it over 20 hours, but I didnt find how to fix it

I had the same issue that could not unlock bootloader neither flash any room after brick. I used the computer downloaded color os and pushed it to my oneplus SD memory with cmd. But before that I installed twrp 2.7.1 in order to be able to flash os. The only rom was color os that I had success to install. Still bootloader not unlocked but color os rom has root privileged. But at least I have working phone. I installed twrp temporarily with toolkit from xda.

I succeeded to install the latest CyanogenMod 4.4.4. It is pain in the ass. But did it. Most implant is to unlock boot loader with flashing files from twrp. Then used toolkit and installed the rom and Chinese fastboot is gone.

[email protected] said:
I succeeded to install the latest CyanogenMod 4.4.4. It is pain in the ass. But did it. Most implant is to unlock boot loader with flashing files from twrp. Then used toolkit and installed the rom and Chinese fastboot is gone.
Click to expand...
Click to collapse
I have same problem as OP.
Code:
(bootloader) Device tampered: true
(bootloader) Device unlocked: false
(bootloader) Charger screen enabled: false
OKAY [ 0.019s]
finished. total time: 0.019s
When i do "fastboot oem unlock" when my phone is in fastboot mode, the CMD tells me
Code:
E:\adt-bundle-windows\sdk\platform-tools>fastboot oem unlock
...
OKAY [ 0.005s]
finished. total time: 0.006s
E:\adt-bundle-windows\sdk\platform-tools>
Than he auto reboots into TWRP. I don't do anything there. I boot to android. I shut down. And I Boot to fastboot again. Than when i try to do a fastboot flash or boot he tells me "DEVICE NOT UNLOCKED cannot BOOT"
So every time i unlock it, he puts it immediatly in lock.
What to do?

Search for my post on the OnePlus.net forum...
And welcome to my 28 hours nightmare

djha53k said:
Search for my post on the OnePlus.net forum...
And welcome to my 28 hours nightmare
Click to expand...
Click to collapse
That's incredibly vague. If you really want to help you should provide a link.
Transmitted via Bacon

Sorry... the search for my nick on OnePlus forum gives you 5 results: https://forums.oneplus.net/search/2437238/?q=djha53k&o=relevance&c[node]=26
anyway here we go: https://forums.oneplus.net/threads/recovery.82350/page-8#post-6054985
edit: I wrote that post from bed at 12:55 AM on Tapatalk... and OnePlus forum is not there...

ever figured out how to fix this problem?
djha53k said:
So, I am the "lucky" one too
I did facktory reset and full wipe as I wanted to install back the CM11s, but I ended up in the "bricked" One :crying:
(bootloader) Device tampered: true
(bootloader) Device unlocked: false
The command: fastboot oem unlock
Reset One to the TWRP, but it does not unlock it
Any falstboot command ends up with: Device not unlocked cannot flash or erase
I already playing with it over 20 hours, but I didnt find how to fix it
Click to expand...
Click to collapse

quackoman said:
ever figured out how to fix this problem?
Click to expand...
Click to collapse
Yes, long long loooooooooooooooooooooong time ago...
Suddenly the engl version of my post was already removed :crying:
I have only the czech version now
http://androidforum.cz/jak-opravit-chybu-device-not-unlocked-cannot-flash-or-erase-t59365.html
use google translator then :angel:

I fixed it by :starting up twrp... then I went to install and searched for the recovery (for me i had to go up a lvl and go to sdcard and it was the stock recovery.img)i wanted to flash but you have to chanege to images at the bottom left then I flashed it as recovery .. it failed then i flashed it as boot and then again as recovery and it worked then i reboted it i was promted with the normal recovery .. wiped data and applyd the oneplus ota update .. now it works grat and is fully unlocked IDK IF THAT WILL WORK FOR U OR EVEN HELP.... not responsible..

[Q] OnePlus One - Unable to unlock bootloader again after relocking

Hi Guys,
Hope to get some help here.
So i unlocked the bootloader of my one plus one and installed supersu + Twrp recovery. All worked fine until i decided to relock the bootloader.
I've put the device into fastboot mode and executed "fastboot oem lock" with twrp recovery still in there.
Now i am trying to unlock the bootloader again using "fastboot oem unlock" to be able to flash the stock recovery and having issues.
output of commands:
Code:
C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot oem unlock
...
OKAY [ 0.004s]
finished. total time: 0.005s
C:\Program Files (x86)\Minimal ADB and Fastboot>
After this it boots straight to twrp recovery. I then hit reboot system and go back to fastboot mode and run the below:
Code:
C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot flash recovery recovery
.img
target reported max download size of 536870912 bytes
sending 'recovery' (12260 KB)...
OKAY [ 0.389s]
writing 'recovery'...
FAILED (remote: Device not unlocked cannot flash or erase)
finished. total time: 0.404s
Anyone has an idea how i can unlock the bootloader again ?
Thanks
Vik

Would it let you reflash the stock factory image thru fastboot? Maybe if you could do that it would let you unlock again. And it would give you stock recovery.
Or else what about the option in developer settings to update the stock cm recovery when installing an update. Maybe you could install an official update thru TWRP and get stock recovery back?
Just throwing out ideas, hope you figure it out

I've documented ths same issue describe here: http://forum.xda-developers.com/oneplus-one/help/locked-bootloader-twr-rooted-t2820341
The solution: http://forum.xda-developers.com/oneplus-one/development/mod-reset-unlock-tamper-bit-t2820912
Download and flash that script.

lemonspeakers said:
I've documented ths same issue describe here: http://forum.xda-developers.com/oneplus-one/help/locked-bootloader-twr-rooted-t2820341
The solution: http://forum.xda-developers.com/oneplus-one/development/mod-reset-unlock-tamper-bit-t2820912
Download and flash that script.
Click to expand...
Click to collapse
Thanks i'll give that a try as soon as am home..

YrrchSebor said:
Would it let you reflash the stock factory image thru fastboot? Maybe if you could do that it would let you unlock again. And it would give you stock recovery.
Or else what about the option in developer settings to update the stock cm recovery when installing an update. Maybe you could install an official update thru TWRP and get stock recovery back?
Just throwing out ideas, hope you figure it out
Click to expand...
Click to collapse
Hi YrrchSebor,
Thanks for the reply.. I already tried all that, even using adb sideload and keep getting same error as mentioned above. I'll try the solution lemonspeakers suggested later today and post the outcome.
Thanks

Vikmeister said:
Hi YrrchSebor,
Thanks for the reply.. I already tried all that, even using adb sideload and keep getting same error as mentioned above. I'll try the solution lemonspeakers suggested later today and post the outcome.
Thanks
Click to expand...
Click to collapse
Be careful if you updated your phone to XNPH30O OTA,
!!! Warning !!!
In the NEW OTA CM11S XNPH30O, the bootloader (aboot) img size changed....
We request all not to apply the unlocker scripts on the new bootloader , until we confirm/find the new bit position.
It might brick your phone and corrupt bootloader...
Click to expand...
Click to collapse
It won't work.. do not try it if you updated to XNPH30O using the OTA.

zephiK said:
Be careful if you updated your phone to XNPH30O OTA,
It won't work.. do not try it if you updated to XNPH30O using the OTA.
Click to expand...
Click to collapse
Thanks for letting me know ZephiK i haven't updated to that version yet. I still have XNPH25R. I should all good.

Fantastic.. Thanks a lot guys.. That worked like a treat.. Bootloader is now unlocked.
:laugh::good:

lemonspeakers said:
I've documented ths same issue describe here: http://forum.xda-developers.com/oneplus-one/help/locked-bootloader-twr-rooted-t2820341
The solution: http://forum.xda-developers.com/oneplus-one/development/mod-reset-unlock-tamper-bit-t2820912
Download and flash that script.
Click to expand...
Click to collapse
I ran this command:
Code:
fastboot.exe boot TWRP-2.7.1.0.img
But the next step does not work:
Code:
It will boot your phone into recovery once from the recovery image
stored in your PC temporarily
then you can flash the zip either by sideload or from sdcard...
I got:
downloading 'boot.img'...
OKAY [ 0.484s]
booting...
FAILED (remote: Device not unlocked cannot boot)
finished. total time: 0.487s

That's because you can't boot a recovery with the recent bootloader unless you're unlocked.
Transmitted via Bacon

Hello,
so how to unlock the bootloader when:
- i can only access to fastboot and i have connectivity to pc;
- command 'fastboot oem unlock' doesn't work( FAILED (remote: oem unlock is disabled) )
- command 'fastboot flash recovery firmware.zip' doesn't work (FAILED (remote: Device not unlocked cannot flash or erase))
- all adb commands say: "error: device not found"
- i can't access recovery for use adb sideload (phone freezes with 1+ icon in screen)
- i can't access Android (phone freezes with 1+ icon in screen)
What can i do?
Thanks in advance!
Gustavo

Im have the same issue but I have no recovery installed..Anyway to do this

i have same issue plz give me any solution if you found any???plz let me know plzzzzz
​
piriri007 said:
Hello,
so how to unlock the bootloader when:
- i can only access to fastboot and i have connectivity to pc;
- command 'fastboot oem unlock' doesn't work( FAILED (remote: oem unlock is disabled) )
- command 'fastboot flash recovery firmware.zip' doesn't work (FAILED (remote: Device not unlocked cannot flash or erase))
- all adb commands say: "error: device not found"
- i can't access recovery for use adb sideload (phone freezes with 1+ icon in screen)
- i can't access Android (phone freezes with 1+ icon in screen)
What can i do?
Thanks in advance!
Gustavo
Click to expand...
Click to collapse
plz help same issue

[RECOVERY][TWRP][Unofficial][Port][ROOT] Ulefone T1

This is a ported TWRP that I put together from another MTK6757 recovery that was twrp ready. I have only used it so far to root my device. I am not responsible for any harm to your device.
1) Backup your phone.
2) Unlock Bootloader (!! YOU ARE WIPING EVERYTHING ON YOUR PHONE !!)
3) fastboot boot recovery-20170912-t1-twrp
4) Swipe modify system partition
5) Install desired root method (I installed Magisk here.)
6) You phone will be back to factory, with root installed.
Enjoy!

Succeeded
Thank you ^ ^
Open CMD (command prompt) and type the next command :
adb reboot bootloader (and press enter)
Now type the next command :
fastboot boot c:\adb\recovery.img (and press enter)
**I installed Magisk but magisk hide not wroking!!! **Why??

how did you get the t1 in too fastboot boot

deanlee121 said:
how did you get the t1 in too fastboot boot
Click to expand...
Click to collapse
Enable USB debugging...
Run: adb reboot bootloader

arcane47 said:
Enable USB debugging...
Run: adb reboot bootloader
Click to expand...
Click to collapse
i have it in fastboot now but when i try to flash twrp i get error: cannot load 'twrp.img
---------- Post added at 08:45 PM ---------- Previous post was at 08:30 PM ----------
lol now i am geting Permission denied

deanlee121 said:
lol now i am geting Permission denied
Click to expand...
Click to collapse
You didn't unlock bootloader:
fastboot oem unlock (This will wipe your data after rebooting)

ok so i got it all working right down to where you flash recovery but when i try to boot to recovery just goes black then reboots thansk for any help think i am going up now lol

thank you got it working
kim wongyu said:
Succeeded
Thank you ^ ^
Open CMD (command prompt) and type the next command :
adb reboot bootloader (and press enter)
Now type the next command :
fastboot boot c:\adb\recovery.img (and press enter)
**I installed Magisk but magisk hide not wroking!!! Why??
Click to expand...
Click to collapse

Ulefone t1
Any custom rom?

Ulefone t1 bootloader
Hello guys I have the latest version of ulefone t1 firmware and I flashed the custome recovery successfully to the phone but I can't enter the recovery + I don't know how to unlock bootloader. Any help ?

iroxor said:
Hello guys I have the latest version of ulefone t1 firmware and I flashed the custome recovery successfully to the phone but I can't enter the recovery + I don't know how to unlock bootloader. Any help ?
Click to expand...
Click to collapse
I only just got my T1 and this is my first time using it but under "Developer options" in settings of the device there is an option for "OEM unlocking". Googling that the first result says "OEM Unlock is a protective in Android Lollipop and later that is usually a step that users need to enable in order to officially unlock the bootloader of their device." Hopefully that helped.

Dizioboy said:
I only just got my T1 and this is my first time using it but under "Developer options" in settings of the device there is an option for "OEM unlocking". Googling that the first result says "OEM Unlock is a protective in Android Lollipop and later that is usually a step that users need to enable in order to officially unlock the bootloader of their device." Hopefully that helped.
Click to expand...
Click to collapse
Hello i already unlocked OEM + running Ulefone T1 version 20170912 but still cant go into recovery :/

iroxor said:
Hello i already unlocked OEM + running Ulefone T1 version 20170912 but still cant go into recovery :/
Click to expand...
Click to collapse
I am now having he same issue. I can boot TWRP remotely but SuperSU didn't work and I can not access the recovery any other way :/

Dizioboy said:
I am now having he same issue. I can boot TWRP remotely but SuperSU didn't work and I can not access the recovery any other way :/
Click to expand...
Click to collapse
Hello, can you tell me what version of ulefone rom & TWRP are you using? thanks

iroxor said:
Hello, can you tell me what version of ulefone rom & TWRP are you using? thanks
Click to expand...
Click to collapse
My version is 2017/08/03

kim wongyu said:
Succeeded
Thank you ^ ^
Open CMD (command prompt) and type the next command :
adb reboot bootloader (and press enter)
Now type the next command :
fastboot boot c:\adb\recovery.img (and press enter)
**I installed Magisk but magisk hide not wroking!!! **Why??
Click to expand...
Click to collapse
Hello, I installed magisk and It works... But with this method "fastboot boot c:\adb\recovery.img (and press enter)" recovery is on PC and If I try "adb reboot recovery" the phone reboot on a black display and after I reboot in normal mode !!!.
And of course, the power+ vol up doesn't work.

Wonder when they will actually create a thread for this phone.

I have the following problem:
PS C:\adb> adb reboot bootloader
PS C:\adb> fastboot boot c:\adb\recovery.img
downloading 'boot.img'...
OKAY [ 0.605s]
booting...
FAILED (remote: not allowed in locked state)
finished. total time: 0.609s
OEM unlock enabeld
USB debugging enabeld
Running currently rom P15_GQ3039LF1_Ulefone_T1_V05_20171030
---------- Post added at 12:17 PM ---------- Previous post was at 11:23 AM ----------
sawo69 said:
I have the following problem:
PS C:\adb> adb reboot bootloader
PS C:\adb> fastboot boot c:\adb\recovery.img
downloading 'boot.img'...
OKAY [ 0.605s]
booting...
FAILED (remote: not allowed in locked state)
finished. total time: 0.609s
OEM unlock enabeld
USB debugging enabeld
Running currently rom P15_GQ3039LF1_Ulefone_T1_V05_20171030
Click to expand...
Click to collapse
Found a solution needed give the commando:
fastboot oem unlock
So the steps should be:
1 adb reboot bootloader
2 fastboot oem unlock
3 fastboot boot c:\adb\recovery.img

sawo69 said:
I have the following problem:
PS C:\adb> adb reboot bootloader
PS C:\adb> fastboot boot c:\adb\recovery.img
downloading 'boot.img'...
OKAY [ 0.605s]
booting...
FAILED (remote: not allowed in locked state)
finished. total time: 0.609s
OEM unlock enabeld
USB debugging enabeld
Running currently rom P15_GQ3039LF1_Ulefone_T1_V05_20171030
---------- Post added at 12:17 PM ---------- Previous post was at 11:23 AM ----------
Found a solution needed give the commando:
fastboot oem unlock
So the steps should be:
1 adb reboot bootloader
2 fastboot oem unlock
3 fastboot boot c:\adb\recovery.img
Click to expand...
Click to collapse
Did this work for you and have you had any issues with your device at all? This is my first MTK device so I want to make sure it's all good. Seems almost too easy compared to rooting and unlocking my Xiaomi devices

When I enter the cmd fastboot reboot bootloader, all I get when the phone reboots is "bootloader mode...." in the lower left corner. When I type fastboot oem unlock all I get it "waiting for device"

Fastboot commands not working. Anyone please help

When i type
Fastboot flashing unlock
Fastboot oem unlock
Or anything and press enter
Fastboot interface exits itself.
And command gets failed
I get this message
FAILED (command write failed (no error))
finished. total time: 0.003 sec.
Anyone please help.

Try enter bootloader (Fastboot Mode) using adb command on Home Screen and make sure EOM Unlock Enable on Developer Options.
adb device -> Make sure Device Detect
adb reboot bootloader -> Reboot to Bootloader
Click to expand...
Click to collapse
If same Error try reflash current version firmware and try again.

I have tried
Still no fastboot command working.

Try change your Adb and Fastboot
https://dl.google.com/android/repository/platform-tools_r30.0.1-windows.zip
reflash current version firmware or reset to Factory and try again.

Thanks a lot

Np ??