X727 (US Model) Persistent bootloader unlock from 5.8.019s - LeEco Le Pro3 ROMs, Kernels, Recoveries, & Other D

WARNING: This ABSOLUTELY HAS THE POTENTIAL TO BRICK YOUR DEVICE. Please tread carefully. I am NOT responsible if you damage your device. This can be very dangerous, PLEASE do not do this unless you know you absolutely want/need to. You have been warned.
Important information:
This is for US Model x727 running the 5.8.019s version of the US ROM. If you flashed the chinese ROM, this will not help you at all.
Afterwards you should still have US ROM and features at version 5.8.019s
Your device should be persistently unlocked after successfully performing this procedure.
This zip file replaces the aboot and xbl (basically, the bootloader) with the versions from the LE_ZL1_LEX720-CN-FN-WAXCNFN5801811021S-5.8.018S.zip ROM file. I can't guarantee this will work for everyone (or even anyone). I can only tell you that it worked for me.
NOTE: If this makes you happy, please consider donating by clicking on the "donate to me" button under my handle at the left. I am broke and trying to recoup the cost of this device
Requirements (what I *think* you'll need):
US Le Pro3 running the US ROM updated to 5.8.019s OTA (If you're running the chinese ROM because you were impatient and didn't want to wait for the grownups to work out a procedure, this will not help you).
TWRP Image (I used the chinese one)
Zip File listed below
Somewhere to put the zip file for flashing if you don't want to have to wipe your device (I've heard of people successfully using an OTG storage device? I just wiped mine so you're on your own to figure this out)
This is the procedure I followed:
Have ADB/Fasboot tools on your computer (I am not helping you here, it you're lucky, maybe your friends will help)
Make sure you have enabled the developer tools, turned on USB debugging, and authorized your computer on your device (again, I'm not helping with that)
Make sure adb can see your device when you run "adb devices"
Run "adb reboot bootloader"
Run "fastboot devices" to make sure you see your device
Run "fastboot oem unlock-go" to unlock your device temporarily
Run "fastboot oem device-info" to verify unlock status
Run "fastboot boot recovery_twrp.img" (or whatever the twrp image filename is on your computer) to boot up to TWRP
NOTE: If you don't read chinese and you haven't done this before, you'll be presented with a screen in chinese with two buttons next to each other and a swipe underneath them. THE BUTTON ON THE RIGHT lets you change the language. Press it, thank me later.
If you have an OTG device with the bootloader replacement zip on it, skip this step. If you have to use your device's storage, and your storage is encrypted, you'll have to wipe all the data. Go to Wipe, choose Format Data and follow the instructions. YOU WILL LOSE EVERYTHING ON YOUR DEVICE. Be warned.
If you wiped your data partition, you'll need to push the zip file to the storage. Run "adb push x727-5.8.019s_bootloader-unlock.zip /sdcard/"
Now press "Install", select the x727-5.8.019s_bootloader-unlock.zip file and flash it.
Reboot back to your system. If you wiped data, your device will now proceed to re-initialize itself as if from the factory
Your system should still be running the full US ROM, but it should also now be persistently unlocked. Don't do any updates, your device likely won't remain unlocked if you run an update. And there's no guarantee you'll be able to re-unlock after doing so.
NOTE: If you flash TWRP to the recovery partition, the OS will likely reset it to the factory recovery UNLESS YOU ROOT THE SYSTEM. Your device is still unlocked, the recovery was just restored by the system, don't freak out. Be warned. I don't have time to answer stupid questions, neither does anyone else.
Download: x727-5.8.019s_bootloader-unlock.zip
MD5: 8eff2a1e29c9959259e7db1dd5c74a67
Special thanks to @hondajohn88 for taking the leap and experimenting with the chinese rom on his own device.

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Reserved

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Is it possible to have the chinese bands with the US rom on the x727? because I'm bringing the phone to asia and i need band 41

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How about pulling us the modem image from the US version now since you have it unlocked. The Grossoshop is great except a few of us have flashed this over the CN ROM and the CN modem seems to be lacking a few bands.

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awesome job! i knew we'd figure out root/unlock eventually. wonder if Le Eco accidently let this happen or did it on purpose so they can have plausible deniability
edit - did you also by chance backup the stock bootloaders?

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Kick ass man!!! I get my phone next week when my dad comes down to visit me in Colombia. Can't wait to do this once it arrives

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I was happy till I saw .. "Run "fastboot oem unlock-go" to unlock your device temporarily"
for some reason I don't get it to work like you guys do. it will give the same error as with the original firmware. Ill try but I doubt it will work for me
Its going to be pointless for me to try .. I don't understand why you guy can have temp bootloader while I cant
And yes, I am on 19s
C:\adb>fastboot oem unlock-go
...
FAILED (remote: oem unlock is not allowed)
finished. total time: 0.005s
C:\adb>fastboot oem device-info
...
(bootloader) Device product name: [le_zl1_oversea]
(bootloader) Device tampered: false
(bootloader) Device unlocked: false
(bootloader) Device critical unlocked: true
(bootloader) Charger screen enabled: false
(bootloader) Serial console enabled: false
(bootloader) Serial hw output enabled: false
(bootloader) Display panel:
OKAY [ 0.091s]
finished. total time: 0.094s

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bulls4ever said:
I was happy till I saw .. "Run "fastboot oem unlock-go" to unlock your device temporarily"
for some reason I don't get it to work like you guys do. it will give the same error as with the original firmware. Ill try but I doubt it will work for me
Click to expand...
Click to collapse
Yeah I absolutely have tried like 6 different adb/fastboot's and nothing works for me either.
Not my first rodeo with annoying Windows drivers too.

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I reset it to factory.. downloaded the 19s and upgraded again .. nothing will make it to allow oem unlock
If i try to run "fastboot boot recovery_twrp.img" will it brick the phone or just wont work?
---------- Post added at 06:20 PM ---------- Previous post was at 06:19 PM ----------
can you upload the "ADB/Fasboot tools" you used? maybe that is the problem but i doubt it

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Just to make sure, you guys are checking "OEM Unlocking" in developer options, correct?

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bulls4ever said:
I reset it to factory.. downloaded the 19s and upgraded again .. nothing will make it to allow oem unlock
If i try to run "fastboot boot recovery_twrp.img" will it brick the phone or just wont work?
---------- Post added at 06:20 PM ---------- Previous post was at 06:19 PM ----------
can you upload the "ADB/Fasboot tools" you used? maybe that is the problem but i doubt it
Click to expand...
Click to collapse
It won't be the fix. If adb/fastboot recognize the devices, changing versions shouldn't work. Sorry :-/ That being said, I suppose there's no hurt in trying. FWIW this is what worked for me on my Windows 7 box:
Code:
C:\Users\dr4stic>adb version
Android Debug Bridge version 1.0.36
Revision 19394af606f6-android
C:\Users\dr4stic>fastboot --version
fastboot version 19394af606f6-android
I got them by installing the Android SDK. The SDK manager indicates that my "Android SDK Platform Tools" (that the tools come from) are at version 24.0.4 and I can upgrade to revision 25.
This may be a dumb question, but I'm assuming you've set the "allow device bootloader unlocking" (or whatever it's called) in the developer settings... right?

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ExTREmE99 said:
awesome job! i knew we'd figure out root/unlock eventually. wonder if Le Eco accidently let this happen or did it on purpose so they can have plausible deniability
edit - did you also by chance backup the stock bootloaders?
Click to expand...
Click to collapse
I did, but I didn't really need to. They're in the 5.8.019s OTA. They're the emmc_appsboot.mbn and xbl.elf files in the firmware-updates folder.

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dr4stic said:
It won't be the fix. If adb/fastboot recognize the devices, it won't work. Sorry :-/
This may be a dumb question, but I'm assuming you've set the "allow device bootloader unlocking" (or whatever it's called) in the developer settings... right?
Click to expand...
Click to collapse
yes, i did
ITs bizarre that some can get the tem unlock and some don't.
Like I said . I reset to fabric, re-updated using the 19s that is in the forum. Enabled developer tools. Enabled OEM unlock and USB dev. I tried to mimic a brand new update to 19s ...
I wonder if it actually enable OEM but adb/fastboot wont say it is unlocked? unlikely but .. hey.. I'm desperate at this point lol
---------- Post added at 06:36 PM ---------- Previous post was at 06:33 PM ----------
My version is 1.0.32 ...
---------- Post added at 06:39 PM ---------- Previous post was at 06:36 PM ----------
no donuts
C:\adb>adb version
Android Debug Bridge version 1.0.36
Revision e02fe72a18c3-android
C:\adb>fastboot oem unlock-go
...
FAILED (remote: oem unlock is not allowed)
finished. total time: 0.015s
C:\adb>

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bulls4ever said:
yes, i did
ITs bizarre that some can get the tem unlock and some don't.
Like I said . I reset to fabric, re-updated using the 19s that is in the forum. Enabled developer tools. Enabled OEM unlock and USB dev. I tried to mimic a brand new update to 19s ...
I wonder if it actually enable OEM but adb/fastboot wont say it is unlocked? unlikely but .. hey.. I'm desperate at this point lol
---------- Post added at 06:36 PM ---------- Previous post was at 06:33 PM ----------
My version is 1.0.32 ...
Click to expand...
Click to collapse
Who knows, maybe the lower version is misinterpreting the output. If you're really determined you can try upgrading your version of adb/fastboot. Like I said I use the sdk from google, so it's as updated as it'll get. Anything else is just someone repackaging what already exists.
After you "fastboot oem unlock-go" try booting the twrp image anyway. I doubt it'll work if it's misinterpreting the response (it would have be interpret it properly to send the boot image to the device for booting), but who knows. Maybe it will work anyway.

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Saikou0taku said:
Just to make sure, you guys are checking "OEM Unlocking" in developer options, correct?
Click to expand...
Click to collapse
yes
Going to try the Android SDK shortly

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bulls4ever said:
yes, i did
ITs bizarre that some can get the tem unlock and some don't.
Like I said . I reset to fabric, re-updated using the 19s that is in the forum. Enabled developer tools. Enabled OEM unlock and USB dev. I tried to mimic a brand new update to 19s ...
I wonder if it actually enable OEM but adb/fastboot wont say it is unlocked? unlikely but .. hey.. I'm desperate at this point lol
Click to expand...
Click to collapse
You know... if worse comes to worst and you desperately want to unlock, couldn't you just try installing the Chinese ROM listed by some of the other users? I don't know how that ROM would react to your phone being that it isn't unlocking at all, maybe it'll brick it, maybe it won't (I doubt it). The consequences of that would completely be of your own undertaking...
That being said, the chinese rom people talk about is signed by LeEco and thus would likely install without question. And it's bootloader would then be unlocked. We could make plans to return you to stock US firmwares at a later date. I suspect we're gonna have to get a solution together for that at some point anyway... My only suggestion would be that you do it while coming from the 5.8.019s (which you already are) because that's where my firmwares are coming from.

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Android SDK will give the same results as expected ...
Not that desperate ... I'm desperate to keep LeEco cause I like it. But do not want to go to Chinese way as it will lose bands and currently we don't even have ways to come back to US rom.
My "desperation" is that the deadline to decide if I will keep the phone or return is approaching.
What I need to figure it out is why some have tem unlock and some don't. My windows is 10. Maybe windows issue (I doubt it)? will try windows 7 later

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bulls4ever said:
Android SDK will give the same results as expected ...
Not that desperate ... I'm desperate to keep LeEco cause I like it. But do not want to go to Chinese way as it will lose bands and currently we don't even have ways to come back to US rom.
My "desperation" is that the deadline to decide if I will keep the phone or return is approaching.
What I need to figure it out is why some have tem unlock and some don't. My windows is 10. Maybe windows issue (I doubt it)? will try windows 7 later
Click to expand...
Click to collapse
No, windows should have nothing to do with it. I'm assembling a "return to US" rom as we speak... but I won't feel comfortable about releasing it until it's been tested. And also I need lunch...

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dr4stic said:
No, windows should have nothing to do with it. I'm assembling a "return to US" rom as we speak... but I won't feel comfortable about releasing it until it's been tested. And also I need lunch...
Click to expand...
Click to collapse
I'm going to use this method later today and can report back any issues. By the way, you are the man!
Is super super flash able after bootloader is unlocked?

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yeah .. windows wasn't the issue. I tested on Ubuntu and it was a no go.
Is it possible that LeEco released like 2 versions being the first a mistake of leaving the bootloader sort of unlocked and then a second with it locked?
I am running out of reasons for not being able to unlock it while some are able to