!!! Warning mi 9 se ARB !!! - Xiaomi Mi 9 SE Guides, News, & Discussion

So, long story...short.
Do not try to roll back from MIUI 11(Android 10), Xiaomi.eu or Masik ROM or any other MIUI 11 with Android 10, to MIUI 10(Android 9).
You will end up with an expensive brick.
Seems like Xiaomi MI 9 SE has some ARB (anti roll back) system integrated.
The phone will not do anything (no fastboot, no ADB, no recovery, no boot, no nothing, just a black screen).The only mode avalaible will be EDL download mode.
For EDL flash you will need some special authorization from Xiaomi to flash your phone with XiaoMiFlash Tool.
But Xiaomi doesn`t authorize anymore any account.
So...the result...a big fat expensive brick.

---

aresbv2000 said:
So, long story...short.
Do not try to roll back from MIUI 11(Android 10), Xiaomi.eu or Masik ROM or any other MIUI 11 with Android 10, to MIUI 10(Android 9).
You will end up with an expensive brick.
Seems like Xiaomi MI 9 SE has some ARB (anti roll back) system integrated.
The phone will not do anything (no fastboot, no ADB, no recovery, no boot, no nothing, just a black screen).The only mode avalaible will be EDL download mode.
For EDL flash you will need some special authorization from Xiaomi to flash your phone with XiaoMiFlash Tool.
But Xiaomi doesn`t authorize anymore any account.
So...the result...a big fat expensive brick.[/QUOTE ]
Where did you get that information? AFAIK, Mi 9 SE doesn't have ARB enabled. Certainly not xiaomi.eu (https://xiaomi.eu/community/threads/9-11-28.53559/). My anti value has been 1 since I have this phone.
Click to expand...
Click to collapse

---

elpaablo said:
Where did you get that information? AFAIK, Mi 9 SE doesn't have ARB enabled. Certainly not xiaomi.eu (https://xiaomi.eu/community/threads/9-11-28.53559/). My anti value has been 1 since I have this phone.
Click to expand...
Click to collapse
Where did I get this info? This is what happend to me
Installed the MIUI 11(android 10) on my phone, just to see how things have changed, and then, i tried to restore my backup.
Now, the phone is dead. The only mode available is EDL mode. But, for flashing this phone it needs some kind of authorized account from Xiaomi.
I have send them a mail, but their reply was this :
"service. global <[email protected]>
To:
[email protected]
Dec 2 at 1:08 PM
Hi,
Thank you for contacting Xiaomi Customer Support and I am Shubham and understand that you want to authorise your Mi account.
I would like to inform you that as of now we there is no such provision for authorizing your Mi account so could not be able to assist you for the same. However, We do not have any official update regarding the service center in your region, So I would request you to coordinate with your respective point of purchase for the same.
For more information, you may refer to the Official Global Website:https://www.mi.com/global/service/warranty/ for updates regarding the warranty in your region.
For any further query, feel free to write us back!
Best regards
Shubham
Xiaomi Customer Support"
So, be careful what you flash on you phone.

---

aresbv2000 said:
Where did I get this info? This is what happend to me
Installed the MIUI 11(android 10) on my phone, just to see how things have changed, and then, i tried to restore my backup.
Now, the phone is dead. The only mode available is EDL mode. But, for flashing this phone it needs some kind of authorized account from Xiaomi.
I have send them a mail, but their reply was this :
"service. global <[email protected]>
To:
[email protected]
Dec 2 at 1:08 PM
Hi,
Thank you for contacting Xiaomi Customer Support and I am Shubham and understand that you want to authorise your Mi account.
I would like to inform you that as of now we there is no such provision for authorizing your Mi account so could not be able to assist you for the same. However, We do not have any official update regarding the service center in your region, So I would request you to coordinate with your respective point of purchase for the same.
For more information, you may refer to the Official Global Website:https://www.mi.com/global/service/warranty/ for updates regarding the warranty in your region.
For any further query, feel free to write us back!
Best regards
Shubham
Xiaomi Customer Support"
So, be careful what you flash on you phone.
Click to expand...
Click to collapse
Well, at least you got a response. My local xiaomi store didn't even answer my emails.
I don't think your problem is about ARB. The same happened to me, doing a full restore. What TWRP did you use?

---

Did you recover you phone? I don`t know what do do I used @redispade TWRP.

---

Actually I installed xiaomi.eu first android beta 10 as soon as it came out, to make tests with the latest twrp and now I am running xiaomi.eu miui 11 android 9 stable. It doesn't depend neither on arb, nor android version. You messed up something during flash, or faulty cable or usb port.
Sent from my Mi 9 SE using Tapatalk

---

redispade said:
Actually I installed xiaomi.eu first android beta 10 as soon as it came out, to make tests with the latest twrp and now I am running xiaomi.eu miui 11 android 9 stable. It doesn't depend neither on arb, nor android version. You messed up something during flash, or faulty cable or usb port.
Sent from my Mi 9 SE using Tapatalk
Click to expand...
Click to collapse
The only thing that i have done is to make a full TWRP backup (excl internal storage). Flashed Masik MIUI 11(android 10).
After that, i didn`t like the ROM, and did a restore using TWRP. The backed up rom was the official MIUI 11(android 9).
The restore process went fine, but after reboot I only get a black screen. I`m not saying that your TWRP bricked up my phone.
I`m just saying that people should be aware of this, because they could brick their phones.

---

Did you format data before restoring?
Sent from my Mi 9 SE using Tapatalk

---

aresbv2000 said:
Did you recover you phone? I don`t know what do do I used @redispade TWRP.
Click to expand...
Click to collapse
Yes, but I had to pay someone to remotely login to my phone with an authorized account. I used another TWRP and my guess is that I messed up the bootloader by restoring every partition. But could be something else. I've restored basic partitions (boot, system, vendor and data) several times with redispade TWRP and I've never had big issues.

---

redispade said:
Did you format data before restoring?
Sent from my Mi 9 SE using Tapatalk
Click to expand...
Click to collapse
No, i didn`t format data before restore. But i did a full restore, every partition that your twrp backups excl internal storage.

---

elpaablo said:
Yes, but I had to pay someone to remotely login to my phone with an authorized account. I used another TWRP and my guess is that I messed up the bootloader by restoring every partition. But could be something else. I've restored basic partitions (boot, system, vendor and data) several times with redispade TWRP and I've never had big issues.
Click to expand...
Click to collapse
Can you please tell me who repaired your phone. I`m searching for someone that hava a authorized account.

---

aresbv2000 said:
No, i didn`t format data before restore. But i did a full restore, every partition that your twrp backups excl internal storage.
Click to expand...
Click to collapse
Format data is necessary even if you flash a different ROM!

---

aresbv2000 said:
No, i didn`t format data before restore. But i did a full restore, every partition that your twrp backups excl internal storage.
Click to expand...
Click to collapse
Yeah, there's probably some partition in there (and here with eu twrp) that bricks the phone.
I PM you with the contact.

---

aresbv2000 said:
No, i didn`t format data before restore. But i did a full restore, every partition that your twrp backups excl internal storage.
Click to expand...
Click to collapse
You don't need to restore every partition, start clean, reinstall the rom, boot the rom, reboot to twrp and restore data and internal storage only

---

redispade said:
You don't need to restore every partition, start clean, reinstall the rom, boot the rom, reboot to twrp and restore data and internal storage only
Click to expand...
Click to collapse
Ok, thank you. So, for example, if I want to try the latest weekly xiaomi.eu ROM, what partition do I have to backup? If I don't like the xiaomi.eu rom, and i want to revert to the latest stable miui 11wich partition do i have to restore, to avoid a brick(again) ? Thank you.

---

aresbv2000 said:
Ok, thank you. So, for example, if I want to try the latest weekly xiaomi.eu ROM, what partition do I have to backup? If I don't like the xiaomi.eu rom, and i want to revert to the latest stable miui 11wich partition do i have to restore, to avoid a brick(again) ? Thank you.
Click to expand...
Click to collapse
Yes actually...
https://r.tapatalk.com/shareLink/to...3&share_fid=3793&share_type=t&link_source=app
Sent from my Mi 9 SE using Tapatalk

---

antoher bricked one, not sure if is hard bricked, so same history around... going from crappy Crdroid 6.1 (Android10) to earlier Crdroid 5.8(Android 9) or Mooke, result in unable to communicate with the device. No system installed, but fortunately twrp and fastboot working but unable to contact with my terminal.
I could access twrp's terminal as sudo so any advice ? solution ? I was trying to copy whole adb_key.pub but was a nightmare by hand...
Please HELP !!!!!!!

---

anotherrandomlinuxpro said:
antoher bricked one, not sure if is hard bricked, so same history around... going from crappy Crdroid 6.1 (Android10) to earlier Crdroid 5.8(Android 9) or Mooke, result in unable to communicate with the device. No system installed, but fortunately twrp and fastboot working but unable to contact with my terminal.
I could access twrp's terminal as sudo so any advice ? solution ? I was trying to copy whole adb_key.pub but was a nightmare by hand...
Please HELP !!!!!!!
Click to expand...
Click to collapse
I would update adb/fastboot tools or reboot to recovery and flash a rom (any rom, just to recover system) from usb-otg.

---

elpaablo said:
I would update adb/fastboot tools or reboot to recovery and flash a rom (any rom, just to recover system) from usb-otg.
Click to expand...
Click to collapse
Thanks, I just managed to reconnect again, not sure how I solved, I was tweaking manually from twrp terminal the build.props file , and was weird swapping usb port worked, with windows neither worked.
So I believed I screwed up the adb keys or something in the device, maybe because failed Vendor flash with fastboot.

---

Just to confirm that I faced the ARB brick while downgrading from Masik Android 10 to Revolution OS Android 9. Two times I faced the problem.
I went to the service center and I was pretending not knowing what was happening to my device. A few days later, I received the phone back to the normal with global ROM. The technician said there was something wrong with the "storage", so he flashed the ROM back.
A week later, I did the same thing again. It happened again. And I just realized it was because of the ROM that has anti-roll back protection while downgrading from android 10 to android 9. I went to the service center again and they happily told me maybe it was the motherboard. So, they changed the motherboard for free. That is my experience about the Mi 9 SE ARB brick.
So, the problem was RevolutionOS or Masik has some kind of ARB brick which causing the phone won't boot up. NO fastboot, No TWRP, No Recovery. Dead. I hope no one would face the same problem like me.