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Re-lock Mi 8 Bootloader after moving from China Stable to Global Stable

Appreciate if someone can help.
I purchased a Mi 8 Chinese version with China Stable ROM, unlocked Bootloader after waiting 372 long hours and yesterday installed recently released Global Stable ROM. Everything went well and phone worked perfectly. However, when I tried to re-lock the Bootloader, (using both XiaoMiTool and Fastboot methods) the Bootloader gets locked but the phone goes into Recovery bootloop every time with a message at the bottom that "this Miui version cannot be installed on this device....." When I unlock the bootloader again (by booting into fastboot and using Xiaomi Unlock tool) the phone boots normally.
So can I conclude that the bootloader cannot be locked unless I move back to China Stable ROM which originally came with the phone? I read somewhere that Xiaomi has disable the re-locking of bootloader just to curb selling of Chinese versions as Global, as some sellers were selling Chinese versions of Xiaomi phones as Global after installing Global ROMs.

I'm having the same issue as you just did. Not sure why the bootloader can't be relocked. I thought the model # between HK and China versions were supposed to be the same..

Recently xiaomi makes some ugly rules about local and global variant device to prevent Chinese device selling globally and global device selling into china. For that user can flash global rom to china variant device and global variant device to china rom, but we have to unlocked bootloader. Device will perform normally just find device will not worked. Also antirollback terrible disgusting too. I have some xiaomi mobile device and selling them one by one. Only keeping Mi8. If I need more secure device, I can buy iphone. I no need then xiaomi device.
People loving Xiaomi because of its hardware and software with up-gradation facilities. But their operating system optimization is really bad. Every update makes device performance different.

dowload mi unlock . and login account -->> reboot mi 8 fastboot -->> unlock -->> OK . Done successful good luck

hoangvubb.195 said:
dowload mi unlock . and login account -->> reboot mi 8 fastboot -->> unlock -->> OK . Done successful good luck
Click to expand...
Click to collapse
Relock and unlock are two very different words. You know.
Sent from my MI 8 using Tapatalk

XiaoMiTool is crap...
Use official MiFlashTool => http://download.appmifile.com/images/2018/06/13/f267b936-45cd-4b3d-b15a-947fb4b674b1.zip
http://en.miui.com/forum.php?mod=viewthread&tid=3014918
Use the option "Clean all and lock" when installing via fastboot

Marcb said:
XiaoMiTool is crap...
Use official MiFlashTool => http://download.appmifile.com/images/2018/06/13/f267b936-45cd-4b3d-b15a-947fb4b674b1.zip
http://en.miui.com/forum.php?mod=viewthread&tid=3014918
Use the option "Clean all and lock" when installing via fastboot
Click to expand...
Click to collapse
No bootloop now after doing this?
Regards

rodfrang said:
No bootloop now after doing this?
Regards
Click to expand...
Click to collapse
Actually I was reading some things on the MIUI official forum and * apparently* if you have a chinese MI 8 and want to switch to Global rom, your bootloader must remain unlobcked.... I'm not seeing much confirmation on that, but I would be catious...

Marcb said:
Actually I was reading some things on the MIUI official forum and * apparently* if you have a chinese MI 8 and want to switch to Global rom, your bootloader must remain unlobcked.... I'm not seeing much confirmation on that, but I would be catious...
Click to expand...
Click to collapse
Yeah, switching to a global rom on a Chinese variant and then locking the bootloader will result in a brick. But I don't understand why anyone would relock the bootloader since most repair shops find out if you unlocked it in the past.

Relock not for warranty reasons, but to get android pay / NFC payment or other banking apps working. Many of them won't work with BL unlocked.

i read that we need an authorized edl account to relock the bootloader, but now it is impossible to get this account..
so this time i'm very dissappointed with xiaomi.

The Marionette said:
Yeah, switching to a global rom on a Chinese variant and then locking the bootloader will result in a brick. But I don't understand why anyone would relock the bootloader since most repair shops find out if you unlocked it in the past.
Click to expand...
Click to collapse
Netflix app and Google Pay needs locked bootloader.

The Mi Mix 2S has the same problem, it seems this person solved it by using recovery version of global ROM with Mi PC Suite: http://en.miui.com/forum.php?mod=viewthread&tid=2943351&page=2#pid27478883
I don't have the device to test it yet, but you should at least be able to keep an unlocked bootloader and use apps that require it to be locked by using Magisk and enabling Magisk Hide on those apps.

Marcb said:
Netflix app and Google Pay needs locked bootloader.
Click to expand...
Click to collapse
Netflix work
Envoyé de mon MI 8 en utilisant Tapatalk

romanxx said:
i read that we need an authorized edl account to relock the bootloader, but now it is impossible to get this account..
so this time i'm very dissappointed with xiaomi.
Click to expand...
Click to collapse
I do not know if I can post the link here, but there is a topic in the MIUI forum that gives EDL authorization for just an unbrick. And you must wait for your position in the list.

Magisk...
I think you can use Netflix and/or banks' apps through Magisk hide functions and so be it

Zanbot3 said:
I think you can use Netflix and/or banks' apps through Magisk hide functions and so be it
Click to expand...
Click to collapse
hye.mi8 with global rom can install magisk?

arsyadvyn said:
hye.mi8 with global rom can install magisk?
Click to expand...
Click to collapse
Yeah

hoangvubb.195 said:
dowload mi unlock . and login account -->> reboot mi 8 fastboot -->> unlock -->> OK . Done successful good luck
Click to expand...
Click to collapse
:good::good:congratulations my friend. I was already sad that I did not understand.
Its solution is simple but of enormous importance for mi8users.
I also did everything ok, but at mi8 it was different. I also received "this Miui version can not be installed on this device ....."
I downloaded miflash unlock .... romGlobal was already installed on mi8 but with blockloaded bootloader it did not work ok.
Now I'm happy and with GlobalRom stable very fast.:good:

Hi,
I try to relock the bootloader with Global ROM install but the phone haven't sign-in with Xiaomi account and it get the same message as your guy "this miui version cannot..." . Now I can't unlock my bootloader to revert it and my phone stay at recovery or fastboot, can anyone know how to flash it back?

Relock bootloader after flash Global Rom

I bought a Xiaomi mi 8 in a Xiaomi Shop in Shanghai. If I try to relock the bootloader I always get stuck booting on the recovery mode. Besides, I can not flash anything (supersu, xposed...) because I always end in bootloop; in both cases it is a softbrick
Can anybody help me?

If you have a mi8 Chinese box you aren't allowed to flash global ROM and lock bootloader.

And is there any way to fix it? Writing to Xiaomi, waiting X time...?
Thanks for your reply!

There are literally, more than a few hundred threads about not relocking. You modified your phone without reading up, no sympathy here. Your phone is dead if it is not global version. Gone. Paperweight. All the best to you

achickennugget said:
There are literally, more than a few hundred threads about not relocking. You modified your phone without reading up, no sympathy here. Your phone is dead if it is not global version. Gone. Paperweight. All the best to you
Click to expand...
Click to collapse
Hey! Nice to meet you and thanks for your kind answer. This placer is better thanks to people like you.
By the way,my mobile works perfectly. I relocked the bootloader more than once and I just needed to unblocked to solve it. About reading the posts, If you had read you would have realized that what interests me is simply to know if I can re-block the bootloader.
Who taught you to help people in forums that have problems and is probably having a bad time? Hitler?

Bortex19 said:
Hey! Nice to meet you and thanks for your kind answer. This placer is better thanks to people like you.
By the way,my mobile works perfectly. I relocked the bootloader more than once and I just needed to unblocked to solve it. About reading the posts, If you had read you would have realized that what interests me is simply to know if I can re-block the bootloader.
Who taught you to help people in forums that have problems and is probably having a bad time? Hitler?
Click to expand...
Click to collapse
You are welcome for my help. There are posts all over. I suggest you learn the courtesy of posting in the right sections instead or even better (to read first), this belongs in Q&A: https://forum.xda-developers.com/mi-8/help/to-relock-bootloader-chinese-device-t3834937 where if you read you would have realized it is all over the place, including one i created: https://forum.xda-developers.com/mi-8/how-to/please-read-tweaking-mi-8-t3833454. Anyways, have a good day, leaving this here for anyone else before they create another thread to "unblock" their bootloader

Bortex19 said:
And is there any way to fix it? Writing to Xiaomi, waiting X time...?
Thanks for your reply!
Click to expand...
Click to collapse
You can check out official xiaomi forum to see a way. However the official way posted there including open up the device & tinkering with the EDL mode, which is really too much of a hassle :/
---------- Post added at 10:58 AM ---------- Previous post was at 10:57 AM ----------
Bortex19 said:
Hey! Nice to meet you and thanks for your kind answer. This placer is better thanks to people like you.
By the way,my mobile works perfectly. I relocked the bootloader more than once and I just needed to unblocked to solve it. About reading the posts, If you had read you would have realized that what interests me is simply to know if I can re-block the bootloader.
Who taught you to help people in forums that have problems and is probably having a bad time? Hitler?
Click to expand...
Click to collapse
Are you having a modern Xiaomi device? How can you relock bootloader without sending it to bootloop?

achickennugget said:
You are welcome for my help. There are posts all over. I suggest you learn the courtesy of posting in the right sections instead or even better (to read first), this belongs in Q&A: https://forum.xda-developers.com/mi-8/help/to-relock-bootloader-chinese-device-t3834937 where if you read you would have realized it is all over the place, including one i created: https://forum.xda-developers.com/mi-8/how-to/please-read-tweaking-mi-8-t3833454. Anyways, have a good day, leaving this here for anyone else before they create another thread to "unblock" their bootloader
Click to expand...
Click to collapse
Better now, at least you're helping to find the information. And you are right, I should read more before doing anything; in fact, I read a lot but you know, internet is so big and it's no difficult to get lost in that information sea (even more if you're a noob in the area). I'll do it better next time.
Have a good day.

TeeHoang said:
You can check out official xiaomi forum to see a way. However the official way posted there including open up the device & tinkering with the EDL mode, which is really too much of a hassle :/
---------- Post added at 10:58 AM ---------- Previous post was at 10:57 AM ----------
Are you having a modern Xiaomi device? How can you relock bootloader without sending it to bootloop?
Click to expand...
Click to collapse
I bought it a couple of weeks ago. And no, I cannot relock it without sending it to bootloop.
The thing went like that: I unlocked the bootloader, I flashed the global ROM, I relocked the bootloader and I fell into recovery bootloop. So I entered on fastboot mode, I unblocked the bootloader again (with the Xiaomi tool), I went to fastboot again and I reflashed the global ROM.
The bootloader have to be open to allow the global ROM work. I don't know why I have avoided the brick, but this is what I've done at least twice.

Bortex19 said:
I bought it a couple of weeks ago. And no, I cannot relock it without sending it to bootloop.
The thing went like that: I unlocked the bootloader, I flashed the global ROM, I relocked the bootloader and I fell into recovery bootloop. So I entered on fastboot mode, I unblocked the bootloader again (with the Xiaomi tool), I went to fastboot again and I reflashed the global ROM.
The bootloader have to be open to allow the global ROM work. I don't know why I have avoided the brick, but this is what I've done at least twice.
Click to expand...
Click to collapse
Well if it bootloops the first time after you relocked it, it'll bootloop again & again. Was there any time after relocking did your phone boot properly? If not, you didn't avoid anything. As far as I understand, boot loop = soft brick.
And this is what I found on MIUI official forum:
TUTORIAL FLASH MI 8 BOOTLOP (SOFTBRICK & BRICK) WITH TESTPOIN:http://en.miui.com/thread-3459005-1-1.html

Bortex19 said:
I bought it a couple of weeks ago. And no, I cannot relock it without sending it to bootloop.
The thing went like that: I unlocked the bootloader, I flashed the global ROM, I relocked the bootloader and I fell into recovery bootloop. So I entered on fastboot mode, I unblocked the bootloader again (with the Xiaomi tool), I went to fastboot again and I reflashed the global ROM.
The bootloader have to be open to allow the global ROM work. I don't know why I have avoided the brick, but this is what I've done at least twice.
Click to expand...
Click to collapse
If I read it right, your device goes into bootloop when installing a Global ROM version and trying to block the bootloader. Probably your device is a Chinese version, which should only have the bootloader locked running a China ROM.
Otherwise, it will be bootloop.

gugugrp said:
If I read it right, your device goes into bootloop when installing a Global ROM version and trying to block the bootloader. Probably your device is a Chinese version, which should only have the bootloader locked running a China ROM.
Otherwise, it will be bootloop.
Click to expand...
Click to collapse
True that. Any Chinese devices running global will get (soft)bricked

Yeah, I was asking is you know the way to lock a chinese phone in global rom. Maybe in the future or with MIUI 10

Is it possible to enter EDL mode via opening your device and connecting the dots to enter 9008 Mode and than use QFIL (Qualcomm_Flash_Image_Loader) to restore the software, instead of going with the MiFlashTool and a needed EDL authorized account?

Bortex19 said:
Yeah, I was asking is you know the way to lock a chinese phone in global rom. Maybe in the future or with MIUI 10
Click to expand...
Click to collapse
This is still too early to know, because development is still slow.

Wrong forum section.

Sigray said:
Wrong forum section.
Click to expand...
Click to collapse
I could not find the way to change it. Do you know how to do it?

achickennugget said:
There are literally, more than a few hundred threads about not relocking. You modified your phone without reading up, no sympathy here. Your phone is dead if it is not global version. Gone. Paperweight. All the best to you
Click to expand...
Click to collapse
Even if he posted in the wrong section he didn't deserve an answer like yours. Keep in mind the Android cooperate spirit and try not to be that rude. And if you had read better his post you had understood how great is the information he gave, go on reading below.
Bortex19 said:
The thing went like that: I unlocked the bootloader, I flashed the global ROM, I relocked the bootloader and I fell into recovery bootloop. So I entered on fastboot mode, I unblocked the bootloader again (with the Xiaomi tool), I went to fastboot again and I reflashed the global ROM.
The bootloader have to be open to allow the global ROM work. I don't know why I have avoided the brick, but this is what I've done at least twice.
Click to expand...
Click to collapse
Actually these are excellent news, I had never read about a case like this. We knew that if the bootloader was unlocked by the seller and you locked it flashing a global rom (being a Chinese phone) you would get a brick only repairable through testpoint and using an authorized account. But I had never read about doing the same whith the bootloader unlocked by the user and I didn't know if it would be possible to unlock it again. So now we know this :
- Chinese unlocked by the seller -> brick locking while flashing global -> impossible to unlock and edl needed
- Chinese unlocked by the owner -> brick locking while flashing global -> ability to re-unlock and flash normally
I had some questions now :
1.- Did you have to wait to unlock the bootloader the first time? (360hrs, 720hrs.. You know)
2.- Did you have to wait when unlocking after the brick or was it instantly unlocked?
Thanks in advance!

descarao81 said:
Even if he posted in the wrong section he didn't deserve an answer like yours. Keep in mind the Android cooperate spirit and try not to be that rude. And if you had read better his post you had understood how great is the information he gave, go on reading below.
Actually these are excellent news, I had never read about a case like this. We knew that if the bootloader was unlocked by the seller and you locked it flashing a global rom (being a Chinese phone) you would get a brick only repairable through testpoint and using an authorized account. But I had never read about doing the same whith the bootloader unlocked by the user and I didn't know if it would be possible to unlock it again. So now we know this :
- Chinese unlocked by the seller -> brick locking while flashing global -> impossible to unlock and edl needed
- Chinese unlocked by the owner -> brick locking while flashing global -> ability to re-unlock and flash normally
I had some questions now :
1.- Did you have to wait to unlock the bootloader the first time? (360hrs, 720hrs.. You know)
2.- Did you have to wait when unlocking after the brick or was it instantly unlocked?
Thanks in advance!
Click to expand...
Click to collapse
It seems to me that this is not so, as some members still manage. However, since they did not add their personal Account to the developer options, they were not able to unlock the device again because they did not have the account associated with the device. It seems to be something related to different cases.
What can be recommended is that the devices unlocked by the seller, return to Chinese ROM more stable, and have your bootloader blocked. By then, the user requests to unblock the bootloader regardless of the time they have to wait. Thus making everything safer, in the case of possible bricks in the future.

gugugrp said:
What can be recommended is that the devices unlocked by the seller, return to Chinese ROM more stable, and have your bootloader blocked. By then, the user requests to unblock the bootloader regardless of the time they have to wait. Thus making everything safer, in the case of possible bricks in the future.
Click to expand...
Click to collapse
Have you ever heard of read about somebody doing that? Because I think there's still the doubt about the unlocking method used by the sellers, whether they do a regular unlock with an account or they patch the boot in any way which could cause problems locking the bootloader.

Received new MI 9 with unlocked bootloader

Hi all.
Just got the transparent edition and it arrived with unlocked bootloader. Already done a ota from 10.2.15 to 10.2.17.
What concerns do I have with this? Obviously I cant relock bootloader and don't really want it locked anyway. Will it be tied to someone else's account because the bootloader was unlocked? What can I flash what can't I flash? Should I return it?
Just want to make sure before I brick a thousand dollar phone.
Cheers

Clarkie_955i said:
Hi all.
Just got the transparent edition and it arrived with unlocked bootloader. Already done a ota from 10.2.15 to 10.2.17.
What concerns do I have with this? Obviously I cant relock bootloader and don't really want it locked anyway. Will it be tied to someone else's account because the bootloader was unlocked? What can I flash what can't I flash? Should I return it?
Just want to make sure before I brick a thousand dollar phone.
Cheers
Click to expand...
Click to collapse
When unlocked, a phone is usually linked to a Miui account.
- If you're in Europe, we got DRM Widevine L1. Unlocking + Flashing could give you WIdevine L3. Remember : Unless you're in Europe, Widevine IS L3 !!
If you're outside Europe, check the LTE/4G bands. They're usually the same, but like the DRM, you can't really "flash" 4G/LTE from a chinese phone to an african, russian phone for example...
When done, try wiping the phone and getting it locked to your phone number in Miui.

That's what i'm saying. Someone else has unlocked it and I just received it yesterday.. That is one of my concerns if I flash it with mi tool will it need someone else's password or mine even though it was set up with my mi account.
The device is tied to my mi account done that on setup . So that's what I'm asking because i never unlocked the bootloader though and someone else did what will happen if I reflash with mi tool. I think it would want my password but I'm just making sure before I do anything.
Cheers

Clarkie_955i said:
Hi all.
Just got the transparent edition and it arrived with unlocked bootloader. Already done a ota from 10.2.15 to 10.2.17.
What concerns do I have with this? Obviously I cant relock bootloader and don't really want it locked anyway. Will it be tied to someone else's account because the bootloader was unlocked? What can I flash what can't I flash? Should I return it?
Just want to make sure before I brick a thousand dollar phone.
Cheers
Click to expand...
Click to collapse
Hi, Mi 9 Transparent is available for China market only (China version), you Cannot relock your bootloader if you're on Global rom, otherwise your phone will be bricked.
Sent from my MI 8 using Tapatalk

sator02 said:
Hi, Mi 9 Transparent is available for China market only (China version), you Cannot relock your bootloader if you're on Global rom, otherwise your phone will be bricked.
Sent from my MI 8 using Tapatalk
Click to expand...
Click to collapse
Said that in my post. About relocking

Fake global

Hi.
Unfortunately, I bought a k20 pro in the global version (aliexpress).
What do I have to do to not have brick? log in to mi account on the phone and Install the original china rom in mi flash and tick Clean all "option (not lock). Then wait again for the unlock bootloader?
having a global rom from aliexpress I can flash twrp right away and change rom ? Non Brick?

Radzią said:
Hi.
Unfortunately, I bought a k20 pro in the global version (aliexpress).
What do I have to do to not have brick? log in to mi account on the phone and Install the original china rom in mi flash and tick Clean all "option (not lock). Then wait again for the unlock bootloader?
having a global rom from aliexpress I can flash twrp right away and change rom ? Non Brick?
Click to expand...
Click to collapse
Basically the trick is to make sure you never accidentally relock the bootloader.
This normally happens if you've stuffed something up and need to flash a fastboot ROM. When this happens ALWAYS remember to change to 'clean All' when flashing with the Mi Flash Tool.
I assume the bootloader is already unlocked. If so, then you're 7 days ahead of the game and can go ahead and install TWRP and any other ROM of your choice. As long as you do everything correctly then you should have no problems.

Robbo.5000 said:
Basically the trick is to make sure you never accidentally relock the bootloader.
This normally happens if you've stuffed something up and need to flash a fastboot ROM. When this happens ALWAYS remember to change to 'clean All' when flashing with the Mi Flash Tool.
I assume the bootloader is already unlocked. If so, then you're 7 days ahead of the game and can go ahead and install TWRP and any other ROM of your choice. As long as you do everything correctly then you should have no problems.
Click to expand...
Click to collapse
I have a fake global and unlocked bootloader. So I can easily install twrp and change rom?
The only one I have to remember is that if I wanted to block bootloader again, I have to do it on china rom?

Radzią said:
I have a fake global and unlocked bootloader. So I can easily install twrp and change rom?
The only one I have to remember is that if I wanted to block bootloader again, I have to do it on china rom?
Click to expand...
Click to collapse
Yes you can install TWRP and change the ROM.
The normal reason to flash a Chinese fastboot ROM is when you have done something wrong and soft bricked the phone. But yes you would also do this if you wanted to lock the bootloader again.

Robbo.5000 said:
Yes you can install TWRP and change the ROM.
The normal reason to flash a Chinese fastboot ROM is when you have done something wrong and soft bricked the phone. But yes you would also do this if you wanted to lock the bootloader again.
Click to expand...
Click to collapse
Okay thanks, I wanted to make sure. Nobody would want to Brick a new phone

I was in the same boat. Just flashed the official China ROM via mi flash including bootloader relock. After I applied for an unlock the official way, waited a week to unlock the phone again and finally flashed twrp, magisk and mi-globe Rom.

Guido83 said:
I was in the same boat. Just flashed the official China ROM via mi flash including bootloader relock. After I applied for an unlock the official way, waited a week to unlock the phone again and finally flashed twrp, magisk and mi-globe Rom.
Click to expand...
Click to collapse
I think I will also choose this way and block bootloader again. It will be safer

Guido83 said:
I was in the same boat. Just flashed the official China ROM via mi flash including bootloader relock. After I applied for an unlock the official way, waited a week to unlock the phone again and finally flashed twrp, magisk and mi-globe Rom.
Click to expand...
Click to collapse
Wait, so you had the 'Global rom' model? Did they leave the phone associated with the Mi account originally? And where did you buy from?
Just curious because my 'Global rom' model K20 Pro arrives tomorrow. Unfortunately ordered the day before all this stuff came out :/

Sorry if this is a bit newby, but I ordered the same (K20 pro) from ali express, there is no way the global rom is official?
If it's not and the bootloader is unlocked, why is this a problem? Because the find my device won't be working? or is the security compromised if it is?
Is the global rom worse than the Chinese? And if the phone isn't disconnected form the Mi account they used to unlock the bootloader with, arn't I screwed?
Sorry for the salvo of questions..

SozzR said:
Sorry if this is a bit newby, but I ordered the same (K20 pro) from ali express, there is no way the global rom is official?
If it's not and the bootloader is unlocked, why is this a problem? Because the find my device won't be working? or is the security compromised if it is?
Is the global rom worse than the Chinese? And if the phone isn't disconnected form the Mi account they used to unlock the bootloader with, arn't I screwed?
Sorry for the salvo of questions..
Click to expand...
Click to collapse
At the moment there is no global version of the phone. So there is no official global ROM. The global ROM versions currently for sale are using a hacked/modified versions of MIUI. These versions are made by people unknown and could possibly contain malware, etc. which could compromise your security. Probably, the ROM will be OK, but you just never know.
Having the bootloader active unlocked isn't a problem normally and gives you the benefit of not having to wait 7 days. You can flash TWRP and install other ROMs with no problem.
But there are a couple of cases on these forums where people have had things go wrong whilst flashing a fastboot ROM using the Mi Flash Tool. They have ended up accidentally relocking the bootloader whilst also corrupting the system partition. Because they haven't unlocked the bootloader themselves originally, they are unable to unlock the phone again and can't install TWRP to install another ROM.
Some people are now choosing to flash an official ROM and relock the bootloader, to allow them to unlock the phone themselves with their own Mi account. So if they end up in the same position as above, they should be able to unlock the bootloader and easily restore the phone.
However some people, when restoring the phone to stock after messing up, have accidentally relocked the phone. When they've tried to go through the unlock process they have found that the phone is still linked to the sellers Mi account and they are unable to link it to their own account and so are unable to unlock it again.
If you never relock the bootloader, either accidentally or deliberately, then you will not have any problems. But if you end up needing to flash a fastboot ROM, then the Mi Flash Tool default option is to flash and relock, so it only takes a brief lapse in concentration to find that you've got a locked bootloader again. If this happens, I would guess that it's far more likely that you won't have any problems and you are able to unlock it again.
---------- Post added at 01:20 AM ---------- Previous post was at 01:18 AM ----------
Radzią said:
I think I will also choose this way and block bootloader again. It will be safer
Click to expand...
Click to collapse
Just be aware that this option also comes with risks. Occasionally some people have found that the phone is still linked to the sellers Mi account, they are then unable to ink it to their own account and so cannot unlock the bootloader again.

[Question] re-lock boot loader

Mi 9t Pro global Rom Miui 10, android 9.
will flash K20 Pro india ROM miui 11, Android 10 fastboot.
why all recommend keeping bootloader unlocked?
i don't want the hassle of banking apps and use Magisk. so what's the problem here of re-lock bootloader after flashing the new ROM?
technical details are most welcome.

Locking bootloader with a different ROM region installed will brick your device. Unbricking will require further wait for bootloader unlock time or you'll need EDL method which I'm not very aware of how it's done.
Sent from my Redmi K20 Pro using Tapatalk

ishaqtkr said:
Locking bootloader with a different ROM region installed will brick your device. Unbricking will require further wait for bootloader unlock time or you'll need EDL method which I'm not very aware of how it's done.
Sent from my Redmi K20 Pro using Tapatalk
Click to expand...
Click to collapse
why locking bootloader with another region rom installed will brick my phone?
and what you mean by brick that it'll never boot?
i got below reply from reddit, what do you think about it??
You are flashing a different version of MIUI. It's not what a lot of people call a ROM (although you are technically correct) . It's not like if you flashed a third party ROM like Lineage or xiaomi.eu... You can relock the bootloader if you have an original xiaomi system and recovery and did not modify your bootloader through a rooting tool (such as having Magisk installed as they get installed and run through a procedure called k-exec that patches the bootloader instead of the system so the hack is unknown to the OS).
Bootloaders are locked to prevent tampering with such exploits. Magisk is not malware but malware and spying tools can be implemented in the same way.
When the bootloader is locked only a ROM and a recovery made by the company that makes the phone can run.
Click to expand...
Click to collapse

NaAZoOR said:
why locking bootloader with another region rom installed will brick my phone?
and what you mean by brick that it'll never boot?
i got below reply from reddit, what do you think about it??
Click to expand...
Click to collapse
I am not sure about that now. But it bricks because that's how Xiaomi have put. I may be wrong but if many people are saying the same then there should be a reason.
Sent from my Redmi K20 Pro using Tapatalk

With official ROM either Global MI, Global EEA or China, with Xiaomi MI Flahs tool you can block the bootloader without any problem.
If you do not usually change the rom, or to custom rom or recoverys custom, it is advisable to block it since you cannot download netflix from the play store and some bank applications mark errors. Otherwise you can unlock the bootloader.
The most important thing about keeping it unlocked is that you lose the equipment warranty.
And the benefit of having it unlocked is that you can change from rom or custom rom, and you don't have to wait for xiaomi time to unlock it again; but lose the warranty.
But you open custom possibilities.

thank you guys, but i really need to know what is exactly meant by hard brick?
is it not to boot again or what??

alanrochasmx said:
With official ROM either Global MI, Global EEA or China, with Xiaomi MI Flahs tool you can block the bootloader without any problem.
If you do not usually change the rom, or to custom rom or recoverys custom, it is advisable to block it since you cannot download netflix from the play store and some bank applications mark errors. Otherwise you can unlock the bootloader.
The most important thing about keeping it unlocked is that you lose the equipment warranty.
And the benefit of having it unlocked is that you can change from rom or custom rom, and you don't have to wait for xiaomi time to unlock it again; but lose the warranty.
But you open custom possibilities.
Click to expand...
Click to collapse
it will be india rom, is it safe to re lock with mi flash after flashing this rom??
also what is hard brick & why everyone keep telling mobile will be hard brick if i re lock bootloader after flashing (any) rom rather than the global rom it came with?

PHP:
NaAZoOR said:
it will be india rom, is it safe to re lock with mi flash after flashing this rom?? YES!!! As long as it is the rom for your model and it is official and you have not modified anything of the rom or the recovery
also what is hard brick & why everyone keep telling mobile will be hard brick if i re lock bootloader after flashing (any) rom rather than the global rom it came with?
Click to expand...
Click to collapse
With the Rom India I have not tried but if I have tried from Rom China to Global MI and vs, Global EEA to Global MI and vs. all oficial´s.

alanrochasmx said:
With official ROM either Global MI, Global EEA or China, with Xiaomi MI Flahs tool you can block the bootloader without any problem.
If you do not usually change the rom, or to custom rom or recoverys custom, it is advisable to block it since you cannot download netflix from the play store and some bank applications mark errors. Otherwise you can unlock the bootloader.
The most important thing about keeping it unlocked is that you lose the equipment warranty.
And the benefit of having it unlocked is that you can change from rom or custom rom, and you don't have to wait for xiaomi time to unlock it again; but lose the warranty.
But you open custom possibilities.
Click to expand...
Click to collapse
Hy!Are you sure that if I own an Chinese variant of k20 pro and if I relockmy bl I won´t brick my device by relocking it?I just unlocked it today and I plan to instal the EU rom and relock my bl.

Just to make it clear...
Chinese K20 Pro needs to have Stock Chinese rom if you want to relock the phone! Without Mods or anything. Just clean Chinese firmware!
The same for indian variant. Only indian firmware without mods.
Also for Mi 9T Pro! Stock rom without mods!
Even TWRP isn't allowed If you wanna relock the bootloader!
If you cross flash roms and relock the bootloader you will brick your device! Your phone won't boot! You will need to open the backcover and boot it into EDL mode and blablabla. There is a thread about that.
Can be found HERE!