yashsingh1/xdaforums huggingface dataset:
[ZenFone 2 General] -fluffy-:
Have u checked that it is enable under development
[ZenFone 2 General] jokerthelegend:
yes and from the original recovery I factory rest and re set up the phone and enable usb debugging and still the same issue
[ZenFone 2 General] Recl@imer:
check bootloader status

Guys,

I believe i successfully followed the steps to unlock the bootloader, got the white splashscreen and everything. How can i confirm the bootloader is indeed unlocked? i tried booting into bootloader mode and the status is "unknown"

Thanks in advance.
[ZenFone 2 General] Recl@imer:
OTA errored out

Hi Everyone,

I unlocked the bootloader, following these steps, i defrosted all apps and did a full unroot and reboot. The OTA started to update fine but then errored out. any ideas why or how to get this going?
[ZenFone 2 General] Ratedzelaya:
Hello,

I tried unlocking my bootloader on 2.19.40.22 i did steps 1-4 and my phone reboots into bootloader mode but it doesn't do anything. it says (continue fastboot process) and that is it.

Can anyone tell me what to do?
[ZenFone 2 General] fuzzybuffalo:
That's what it says after you unlock your bootloader.

Go ahead and boot phone up normally and see if you have a white splashscreen, if you do you are unlocked.

Then you can fastboot flash the black splashscreen if you want.
[ZenFone 2 General] Ratedzelaya:
I booted up normally, but the splash screen is still black, I don't think it unlocked it.
[ZenFone 2 General] asheehanjr:
I'm on build number 2.19.40.22. I have it rooted and I just can't seem to get this bootloader unlocked. I have tried everything suggested with both cmds for adb and android terminal. I can adb shell and su to be reconized with no problem, but I just don't know. When I did tried the android termainal command I got a "access denied" with using Shell terminal. Any suggestions I would appreciate it. My phone is the 55L version and I have the quick easy adb installed on my pc.
[ZenFone 2 General] fuzzybuffalo:
You could try it from a terminal app also, you 2 are the first ones I've seen trying it on the 40.22 update.

In terminal you do not need adb shell, you are not using adb. Just leave out that step and start from the su step.
[ZenFone 2 General] Ratedzelaya:
I did try terminal and it did the same thing, so I guess it doesn't work on latest update
[ZenFone 2 General] fuzzybuffalo:
In fastboot / bootloader mode, what bootloader version does it say?

Mine says unknown.

I don't think the bootloader changed from 2.19.40.18 to 2.19.40.22, so it should work.

I unlocked on 40.18 then took the OTA update to 40.22.

I have seen some guys have to try a couple of times before it worked.

Edit: It's also posted earlier in the thread, it worked on 2.19.40.20.
[ZenFone 2 General] Ratedzelaya:
Mine also says unknown bootloader
[ZenFone 2 General] asheehanjr:
I attached a screenshot of what the android terminal is saying. Hope this might give an idea.
[ZenFone 2 General] fuzzybuffalo:
You don't have root, when you type su and hit enter, you should get a # prompt.
[ZenFone 2 General] fuzzybuffalo:
Hmmm... It actually sounds like your unlocked, but it would be the first time I've heard of without the white splashscreen.

With the unknown bootloader version and the continue the fastboot process, in fastboot / bootloader mode.

Do signing and secure boot both have a ? after them, in fastboot / bootloader mode? Mine do.

Have you tried again, does it do the same thing?

I've also seen it work for guys after fastboot flashing the bootloader again.

The only way I know of to check for sure, is to fastboot flash the twrp.img, if it sticks then you are unlocked.

If your not unlocked, the twrp.img will not stick and you will still have a stock recovery.
[ZenFone 2 General] asheehanjr:
What I don't understand if Its saying I don't have root then how come root checker and shell is saying I have root when it asked me to grant it? That what Im confused on. And the other terminal that im using is giving me the # symbol. lol.
[ZenFone 2 General] fuzzybuffalo:
I don't understand that one either, the permission denied error from your first screenshot above is the error you get when you don't have root and it can't create a file or folder on your system. It definitely looks like you have root.

Have you tried it from the terminal emulator that gets the # prompt, do you get the same error?
[ZenFone 2 General] asheehanjr:
Yea I tried it from the other terminal and got the # nothing happend. I'm assuming they probably patched it. The weird thing is. I downloaded the debloated rom thats the 2.19.40.20 and had that on the sdcard and loaded up the tethered cwm and flashed that. Then when it rebooted from the bootloader it said unlocked and got the white screen. Its weird but going to flash twrp now.
[ZenFone 2 General] fuzzybuffalo:
LOL, yepper weird but glad it worked.
[ZenFone 2 General] asheehanjr:
IM just going to stay on this version for now since twrp is working. lol. Thanks again! ;)
[ZenFone 2 General] Ratedzelaya:
Ok, I'll try to flash the twrp image.

---------- Post added at 06:12 AM ---------- Previous post was at 06:06 AM ----------

You probably have to go to the super su app and allow it permission from there, as some times it denies root permission. This happened to me but with adb, because my phone was locked I didn't see the prompt; so I had to go into supersu and change it manually
[ZenFone 2 General] mikbob:
Just tried updating on the 2.19.40.22 update, all the commands ran fine but my splash screen has not changed. I'm assuming this means that it is not unlocked so this may mean that ASUS has patched the unlock in the new software.

EDIT: Tried installing TWRP anyway, but it refuses to boot into recovery. I'm reflashing the stock recovery now.
[ZenFone 2 General] fuzzybuffalo:
The post below yours said it did not work, and reflashed stock.

asheehanjr's acted like it worked but did not activate until he flashed the debloated ROM.

Yepper, that's what I thought also, but if you look close at his 3rd screenshot, it shows su without the prompt, but with the toast popup granting superuser rights. Weird.
[ZenFone 2 General] Ratedzelaya:
Have not yet tried flashing twrp but will as soon as I get adb back on my pc, I was running the windows 10 insider preview. Maybe that was the problem, im back on 7 though will try with 7 now.
[ZenFone 2 General] Ratedzelaya:
I checked my bootloader and signing and secure boot both have a ?. So I'm guessing it's unlocked :)
[ZenFone 2 General] fuzzybuffalo:
I would have thought so too, all the signs point to it being unlocked.

But after reading post# 363, I'm not so sure.

If flashing TWRP fails and you have to flash back to stock recovery, read post# 359 and try using the tethered recovery from this thread

http://xdaforums.com/zenfone2/development/alpha-tethered-twrp-asus-zenfone-2-t3123532

and install the debloated 2.19.40.20 ROM from this thread

http://xdaforums.com/zenfone2/development/rom-2-19-40-18-rom-ze551-goodbye-t3144291

worked for asheehanjr
[ZenFone 2 General] Ratedzelaya:
Ok, thanks for your help
[ZenFone 2 General] fuzzybuffalo:
Your welcome, hope it works for you.
[ZenFone 2 General] Ratedzelaya:
ok so i tried flashing the recovery with fastboot and it started to flash and everything but then it said permission denied, so i guess i have to go back to 2.19.40.20 to unlock the bootloader and flash twrp. I was just wondering if once you flash twrp can you still flash ota's or not?

---------- Post added at 01:00 PM ---------- Previous post was at 12:58 PM ----------

also now when i try to go into recovery through bootloader it just restarts back into bootloader
[ZenFone 2 General] fuzzybuffalo:
No, you need to flash back to the stock recovery.

You need to flash back to the stock recovery. :)
[ZenFone 2 General] Ratedzelaya:
how do i do that
[ZenFone 2 General] fuzzybuffalo:
I was just looking for a 2.19.40.20 stock recovery, I've got a 2.19.40.18.

You just fastboot flash recovery file_name.img.
[ZenFone 2 General] IronBorg:
Worked on my ZE551ML Thanks!

You sir are amazing! This fixed my problem
[ZenFone 2 General] fuzzybuffalo:
Found them...

http://www.mediafire.com/folder/setyy42t2cymy#8fkqf3t71fa4s

Go to your device folder, Z00A is 551ML, then

go to the folder you want 2.19.40.22 or 2.19.40.20 and download the recovery.img

use this command

fastboot flash recovery recovery.img

Thanks go to Shakalaca for his files from this thread...

http://xdaforums.com/zenfone2/orig-development/rom-pre-root-img-t3079590

[ROM] Pre-root system.img
[ZenFone 2 General] Ratedzelaya:
where did you find the stock recovery, can i get it from latest ota?

---------- Post added at 02:28 PM ---------- Previous post was at 02:20 PM ----------

ok, i went to the link you sent and downloaded the recovery.img and flashed it, and i got the stock recovery back. Again thank you very much. So i would have to sideload 2.19.40.20 or 18 in order to be able to unlock bootloader and flash twrp?
[ZenFone 2 General] fuzzybuffalo:
Yes and you are welcome.
[ZenFone 2 General] Ratedzelaya:
ok, thanks. i guess i wont do it until a custom rom comes out for it because i don't want to loose my data.
[ZenFone 2 General] fonetyk:
I already updated to 2.19.40.22 (ZE551 ) and haven't rooted nor unlocked the bootloader. How can I go back to 2.19.40.18 or 2.19.40.20 in order to unlock it?

I'm asking because fuzzybuffalo said to install the "2.19.40.20 Full ROM - ZE551 - Goodbye Garbage" but it says not to install it if you have a locked bootloader.
[ZenFone 2 General] WarnerCP:
Hello, sorry for my bad English, I already updated to 2.19.40.22 (ZE551), I have root, I type in adb commands but the bootloader keep saying "unknow"
[ZenFone 2 General] troy5890:
Hello, I was wondering if anyone with the ZE550ML model got the ota update yet (2.19)?

Sent from my ZE550ML
[ZenFone 2 General] SRV Rockable:
Please never quote whole OP :banghead:
[ZenFone 2 General] Christopher876:
Thank you both for helping out but instead of the nonrooted rom, I used the pre-rooted then unroot it (phone just would not downgrade with the nonrooted).

Yeah, very annoying. But, I can you one thing, if I have to do this whole process over again I will just wait for a custom rom instead of the official Asus updates!
[ZenFone 2 General] lordpipa:
I'm Mobile so it only shows continue reading. Didn't know scrolling was that hard.
[ZenFone 2 General] ansebovi:
well yes,it is hard to scroll,when guys think its hard to mention OP name or deleting the words of OP post or doesnt need OP post at all ..and dont want to fight,but stating my reason as you said yours...and i dont want to mess this guide by anymore replies
[ZenFone 2 General] lordpipa:
What has become of this forum. Bunch of whiners, who can't look past a post that's not even directed at them. Next time will do. Tnx for the advise.

Edit. First post edited[emoji1]
[ZenFone 2 General] ultramag69:
Easy... Thanks for this, now the devs can get their teeth into it to try out their X86 cooking skills...
[ZenFone 2 General] vhicke:
It works when you do the first part it says unlocking bootloader. this is great news.....I hope that more people and developers will take more interest in the asus zenfone 2. Thank you guys for the hard work.
[ZenFone 2 General] saurabhrck:
This day is keep getting better.
[ZenFone 2 General] jejemc:
Good evening the tone in ota update once unlock? thank you ;)
[ZenFone 2 General] Jexbox:
any chance of working on older zenfones?

I own a asus zenfone 4 a450cg, There was no tool to unlock this phone's bootloader, so will this method work on this phone ? or anyother way because there's no development for this device :(
[ZenFone 2 General] GeneralPag:
Really need to flash black screen? I like the white one.
[ZenFone 2 General] Jexbox:
nope, you can use the white one as long as you like
[ZenFone 2 General] RGoody:
I used the pre-rooted system image with my 2.19.40.18 update, but I'm still using the boot, fastboot, and recovery images from 2.18.x, as the 2.19.x images were't available from the pre-rooted system image MEGA download folder. Is there any way that I can update all of my images (boot, fastboot, recovery) to 2.19.x so that I can unlock the bootloader? I already followed the directions here, but I am not getting a white splash screen.
[ZenFone 2 General] rafyvitto:
Grab the droidboot.img(fastboot img) from the 2.19 ota zip and flash it using fastboot "fastboot flash fastboot droidboot.img"" and follow the unlock procedure, and you'l be unlocked.
[ZenFone 2 General] RGoody:
Awesome, thanks.
[ZenFone 2 General] Xcaliber:
Had the same issue with my Chinese version. It would not update.

I fixed it by using the PreRoot update instead. Then if you dont want root, just go to SuperSU and click "FULL UNROOT".

Now you'll have the latest version, without Chinese apps, and without root.

:)
[ZenFone 2 General] fuzzybuffalo:
That's one nasty white screen. :crying:

Where's TBO when you need them? :laugh:
[ZenFone 2 General] hi-phile:
So now in theory this should allow us to override the region SKU of say the CN version to a different region.

Does anyone know what the procedure is to fully modify a CN phone and spoof the SFI table to a US or WW SKU? Reason I ask is that i'm unable to get 4G LTE even after converting from CN to WW, as the phone still shows it's using CN radio region. If necessary, I am willing to use my phone as the test and wipe the phone and start from just the hardware.
[ZenFone 2 General] Mazda:
Not for nothing but what's wrong with the post that Sean made?

He's not taking credit for anything, in fact he mentioned that you and crpalmer were doing the work.......

All it was just a pic to show where you guys were at with things. Think you should just chill out a bit man. Nobody is trying to discredit you or take any credit away from you

No need for the hostile behavior over a post that clearly wasn't intended to take credit for anything, just to inform users
[ZenFone 2 General] -fluffy-:
I can only say +1 to u just my words

But if he looks for credit I can give him 10 USD credit ;)
[ZenFone 2 General] jrior001:
Him and I discussed privately not longer after my post. He understood why I was pissy about it. We're good, i thought. I even picked up a couple of his commits for the cause, and would gladly accept more. Anything else you like to discuss on this topic shoot me a PM or hop on our IRC channel #zenfone2.
[ZenFone 2 General] chooks06:
That's cool guys!

Sent from my ASUS_Z00AD
[ZenFone 2 General] jarjarbingie:
been lurking here in the forum for the past few days and so far, I've got my phone rooted, thanks to the 1click root.. however, before I rooted my phone, I already updated to .22 and it seems there is no luck in unlocking the bootloader in that version.. should I sideload .20 and OTA .22 or perhaps leave it at .20? or is there an alternative way in unlocking the bootloader? TIA guys!
[ZenFone 2 General] seageate:
try to downgrade to .20 or .18 and then try
[ZenFone 2 General] BobboVilla:
This happens to me too. Updated to 22, unlocked bootloader (it worked and kept the splash screen black), flashed TWRP without errors, but when I boot into recovery I get sent back to bootloader :(.

Did flashing the stock recovery work? Did you manage to flash TWRP in the end?
[ZenFone 2 General] coubi64:
My phone is rooted and has version 2.19.40.20 but I have this error message :

Could you tell me what to do to solve it?
[ZenFone 2 General] yakub234go:
r u rooted ? if yes grant permission to the terminal

if not then root ur device first then try again
[ZenFone 2 General] coubi64:
I hadn't activate root on phone when SuperSu asked..... If it can help.

Thank you for your reply.
[ZenFone 2 General] mikeydubbs:
Worked flawlessly

went without a hitch! thanks :D
[ZenFone 2 General] sdrawkcab3:
I tried downgrading to .20 via adb in stock recovery just after .22 was released and it wouldn't flash over a newer version. I assumed this would happen regardless of flash method. What's the procedure to downgrade?

Also, is it possible to flash back to stock recovery after flashing TWRP?
[ZenFone 2 General] kanagawaben:
If you want to downgrade to .20 I believe you need to flash the .20 boot.img and droidboot.img and recovery.img first before flashing the system.img.

You can reflash stock recovery to replace TWRP, no problem.
[ZenFone 2 General] Harfainx:
I've gone from .22 all the way back to .18.

I use TWRP to flash the builds as needed. I flash over everything except recovery.
[ZenFone 2 General] zek:
Hi

Can someone write a step by step howto downgrading and unlock the bootloader for newbies whith .22 update?
[ZenFone 2 General] kanagawaben:
By

No need for a new guide, if you ask me. I have managed to downgrade several times and also unlocked my bootloader following guides already posted, and I'm still pretty much a newbie to Android and this phone.

Just follow the root guide (resources thread at top of general section) for pre-rooted image (method 1) using the files for the version you want to downgrade to (20 to unlock 551?), then follow the unlock instructions here.
[ZenFone 2 General] jokerthelegend:
will it work with 2.19.40.22 ?, if it will not work whats the solution ?
[ZenFone 2 General] -fluffy-:
Read the post just above ur post
[ZenFone 2 General] supertrue:
problems with this method

hello

when I entered these commands at CMD,(adb shell,su ,getprop ro.isn > /factory/asuskey,reboot bootloader)

but my cellphone showed NORMAL BOOT, then it did not go on and kept the status.

i.e., it did not update itself. and no white screen occurred.

could you tell me how to deal with this problem?

thanks
[ZenFone 2 General] BananaCHIU:
Is it possible to re-lock this device?
[ZenFone 2 General] OfficerJimLahey:
Not at this point. Probably only when ASUS provides the official unlock method, and even then, it may not work with this (unofficial method).

Consider it permanent.
[ZenFone 2 General] K3up0n:
i can't unlock with .22 same problems for you ?
[ZenFone 2 General] -fluffy-:
U need droidboot from 20
[ZenFone 2 General] saurabhrck:
only the droidboot or will have to flash the whole .20 build with recovery??
[ZenFone 2 General] -fluffy-:
Only droidboot that's the boot loader
[ZenFone 2 General] saurabhrck:
okk. thnx!
[ZenFone 2 General] fendidjulianto:
is it worthed to unlock bootloader or not ? just want to know what other think bout it.... and if so why ?
[ZenFone 2 General] -fluffy-:
Yes offcourse it is
[ZenFone 2 General] GGL-Daz:
But at the minute theirs no true custom roms and you can't relock the bootloader meaning you lose your warranty.
[ZenFone 2 General] oXydead:
Hi, i bought my phone from China and later on, i installed the WW rom. Which OTA should i download?
[ZenFone 2 General] jokerthelegend:
I can`t downgrade from 2.19.40.22 to 2.19.40.20 I wiped every thing with TWRP and tried to flash 2.19.40.20 but failed also tried to side-load 2.19.40.20 and failed, plz help how can i downgrade to 2.19.40.20 step by step to be able to unlock the boot-loader
[ZenFone 2 General] gambit1091:
Can I still apply official OTA after unlocking my bootloader or do I have to sideload every now and then?
[ZenFone 2 General] donkson:
Pls see # 405 :)
[ZenFone 2 General] fendidjulianto:
there's still no custom rom for zenfone 2 ... and i heard that update to 5.1 soon will come. it makes me more confuse..either to unlock or not.
[ZenFone 2 General] Ntrasme:
I recommend not unlocking yet. I use the phone as my daily driver so I can't afford to flash nightlies until they are stable. And an official way to unlock might come out in the meantime. Just my opinion.
[ZenFone 2 General] fuzzybuffalo:
Unlocked bootloader makes no difference to OTA's. Just the method you root with does.

If you root with method 3 from the resources thread and unlock your bootloader, you can still take OTA's.

If you fastboot flash TWRP, you have to fastboot flash back to a stock recovery to be able to take OTA's.

That's what I did, rooted with method 3 and unlocked the bootloader.

I have not deleted or frozen any system apps with Titanium Backup. I have not installed Xposed.

I was able to OTA from 2.19.40.18 to 2.19.40.22.

If you use the official method, once it comes out, you still lose your warranty.

If you OTA up to 5.1 you might have to wait for the official method to unlock your bootloader.

You cannot unlock your bootloader if you are on 2.19.40.22, but you can still downgrade your bootloader to 2.19.40.20 and unlock it.

It might not be possible to downgrade your bootloader from 5.1.
[ZenFone 2 General] GGL-Daz:
But will unlocking the bootloader now possibly have any effect on are ability to upgrade to the official 5.1 release?
[ZenFone 2 General] chubby65:
No effect at all
[ZenFone 2 General] GGL-Daz:
Please delete
[ZenFone 2 General] kenthko:
[MENTION=5973725]fuzzybuffalo[/MENTION],

Can you explain what you mean with "If you use the official method, once it comes out, you still lose your warranty."? Just need to know so I can avoid losing warranty.

Thank you very much in advance.
[ZenFone 2 General] BobboVilla:
I think he means that the official method will likely require you registering your device ID (IMEI or other ID) on Asus's server, meaning that they'll have official record of you opening the bootloader.
[ZenFone 2 General] kenthko:
[MENTION=5915467]BobboVilla[/MENTION],

Thanks for clarifying. :) Sorry noob here.
[ZenFone 2 General] BobboVilla:
Personally I don't think you should apologize for asking a noob question - everyone started as a noob :laugh:.
[ZenFone 2 General] fuzzybuffalo:
I heard that when Asus releases the official unlocker, they make you agree to waive your warranty before you can download it.
[ZenFone 2 General] Harfainx:
Most unlocker tools come with a requirement of logging in before getting access to unlock. There you waive the warranty of damages caused by anything related to unlocking and software modifications.

Physical damage and manufacturer defects are still covered normally.

The best way to keep your warranty is to either not unlock, or wait until there's a way to relock without a tool. Unlocking with an unofficial method (like we have now) is fine as long as you can relock before requesting RMA/replacement/work.
[ZenFone 2 General] sorg:
Not correct already several days. Just use my unlocker on 2.19.40.22. You don't need to downgrade or root or flash anything.
[ZenFone 2 General] Harfainx:
It just needs the droidboot from .18 or .20, doesn't it? No need to downgrade for that. Just need to flash the droidboot, but not the whole ROM.

Unless I'm mistaken, which I could be... I unlocked and never looked back lol :D
[ZenFone 2 General] fuzzybuffalo:
Where's this unlocker at?

Droidboot is your bootloader, that's why I said if you were on 40.22 you needed to downgrade you bootloader to 40.20, but he's saying he's got an unlocker that will work on 40.22 without root.
[ZenFone 2 General] Harfainx:
Well, fastboot anyway.

The unlocker probably has a built in script to flash an earlier droidboot img and then continue the process.

Unless there's a way to do it right from 22. I'm not familiar with any 22 methods (mostly because I never needed one).
[ZenFone 2 General] fuzzybuffalo:
The script would have to do something besides the commands from the OP.

I've seen 3 people try the commands on 22 and it did not work, besides you need root for the commands to work.
[ZenFone 2 General] sorg:
I don't know which unlocker about you are talking, but my unlocker is here:

http://xdaforums.com/zenfone2/general/tool-one-click-bootloader-unlock-root-t3155884

It doesn't flash to ROM anything. It's just pushes binaries to RAM (/tmp directory is in RAM) and then start modified droidboot binary which does unlock process.

Everything made while you are in fastboot mode, so no root required.
[ZenFone 2 General] Harfainx:
Nice to know. Thanks for explaining. :highfive:
[ZenFone 2 General] Deadnight93:
This method work also with 2.20 version for ze551ml (beta test version). Thanks to developers! :good:
[ZenFone 2 General] cjvzla:
so this is the one i need if i am stock 40.22, im also not rooted. so just use this one right?

EDIT: Just tried it ant splash screen turned up white so guess it worked...right?
[ZenFone 2 General] -fluffy-:
Yes u are unlocked