Bootloop after flashing any kernel - Samsung Galaxy M21 Questions & Answers

Good time of the day, I need help with resolving the issue mentioned in title. No matter which kernels I flash, bootloop consistently occurs. I flashed them using TWRP and cleared all caches as required, but to no avail. Neither on a clean system nor on a rooted one do they work

Did you recently upgrade to May1 Security Patched Firmware upgrade?

OldNoobOne said:
Did you recently upgrade to May1 Security Patched Firmware upgrade?
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Click to collapse
Yes, I did

VerySorryFor said:
Yes, I did
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Click to collapse
ok I thought so, atleast flashing disable-dmverity makes the GSI boot to rom logo but nothing beyond that, it just refuses to boot anything but the latest Stock ROM, I think its time to throw away this device (SM-M215G) into the garbage bin. Man Shamshung ruined my device, now stuck on 1UI5.1!
#Edit: You can try to contact a dev called Fredin, he might be able to help if there is any hope at all, you can find him on TGram & M21 Threads btw, all the best

VerySorryFor said:
Yes, I did
Click to expand...
Click to collapse
Have you tried flashing Kernel through Terminal or ADB sideload? Try finding out if A13 Stock ROM is R/O-System?

Related

Flashed Germany 4.3 Stuck on Samsung Screen

Hello Guys i flashed the Germany Version of 4.3 lte last night and in doing so i have Temporarily killed my Phone.
I have tried all the Recoveries processes via Kies and Odin and i am having no luck.
I think the reason why it won't flash is because the Germany 4.3 is a Newer Version than the Stock 4.1.2.
When i'm in Odin i get sboot.bin Fail when trying to Flash the Latest Stock rom. I am able to Flash the Germany 4.3 again and that flashes but then the Phone Stays on the Samsung Flash Screen.
Could someone please Help? I have been on with this for Hours now. I think what i need is a 4.3 Version of any rom in Odin .tar format so i can at least get the phone to boot up and then maybe i can get CWM Recovery on there and flash a Stock rom that way.
Thanks in Advance
You have to remove sboot.bin and tz.bin when downgrading. Be careful, downgrading will give you Knox warranty void 0x1!
Sent from my GT-I9305 using xda app-developers app
.NetRolller 3D said:
You have to remove sboot.bin and tz.bin when downgrading. Be careful, downgrading will give you Knox warranty void 0x1!
Sent from my GT-I9305 using xda app-developers app
Click to expand...
Click to collapse
I have already seen that Message in Tiny Writing. What does that mean if i get that and how do you remove sboot.bin and TZ.bin
Do i remove them from the Stock 4.1.2 or the Germany 4.3?
My head is well and truely done in. I was up till 5am trying to fix it and then when i woke i went straight back to it and i still havn't got it working.
Thanks for your help in advance.
marti4578 said:
I have already seen that Message in Tiny Writing. What does that mean if i get that and how do you remove sboot.bin and TZ.bin
Do i remove them from the Stock 4.1.2 or the Germany 4.3?
My head is well and truely done in. I was up till 5am trying to fix it and then when i woke i went straight back to it and i still havn't got it working.
Thanks for your help in advance.
Click to expand...
Click to collapse
I am in the same boat if u found a solution help me also
Currently i flashed philz recovery upon which i have flashed tgp 11.30 but have no imei baseband.
marti4578 said:
I have already seen that Message in Tiny Writing. What does that mean if i get that.
= warranty void and no way so far to remove the count .
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AMoizK said:
I am in the same boat if u found a solution help me also
Currently i flashed philz recovery upon which i have flashed tgp 11.30 but have no imei baseband.
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Click to collapse
Have you got any efs backup made by yourself? Or have you ever used boeffla kernel or any other that backups efs partition?
Hbohd said:
Have you got any efs backup made by yourself? Or have you ever used boeffla kernel or any other that backups efs partition?
Click to expand...
Click to collapse
Hello I don't have any EFS Backups done by Myself and i have never used Boeffla Kernel or any other Backup. I am so at my Witts end it unreal.
I have tried to do Kies recovery and i am back at the Firmware Upgrade Encountered an Issue. Please select recovery mode in Kies and Try again.
I have no idea which way to go or what to do. I know it will be fixed but i have little Faith at the Moment.
Thanks for your help in advance.
marti4578 said:
Hello I don't have any EFS Backups done by Myself and i have never used Boeffla Kernel or any other Backup. I am so at my Witts end it unreal.
I have tried to do Kies recovery and i am back at the Firmware Upgrade Encountered an Issue. Please select recovery mode in Kies and Try again.
I have no idea which way to go or what to do. I know it will be fixed but i have little Faith at the Moment.
Thanks for your help in advance.
Click to expand...
Click to collapse
THE kies frimware intilition doesnt work as you have 4.3 bootloader and knox blocks older boot loader
dont worry when 4.3 becomes available in your area it wont have to downgrade and ultimately this method will work but still things are looking pretty bad dor the intermediatory days.
PS is ther anyway to restore baseband imei without any backup
AMoizK said:
THE kies frimware intilition doesnt work as you have 4.3 bootloader and knox blocks older boot loader
dont worry when 4.3 becomes available in your area it wont have to downgrade and ultimately this method will work but still things are looking pretty bad dor the intermediatory days.
PS is ther anyway to restore baseband imei without any backup
Click to expand...
Click to collapse
What if i download the Germany Version again and try flashing. I thought it would of worked? I am now in this situation surely the Country it comes from wouldn't make a difference? Could someone take the Germany 4.3 and make it a Working Version .tar file to flash with Odin3?
marti4578 said:
What if i download the Germany Version again and try flashing. I thought it would of worked? I am now in this situation surely the Country it comes from wouldn't make a difference? Could someone take the Germany 4.3 and make it a Working Version .tar file to flash with Odin3?
Click to expand...
Click to collapse
I ment through kies.
Hello Guys i have Fantastic News!!
I have no idea what i did different, However i have reflashed the German 4.3 on my GT-I9305 and this time to my Total Surprise it worked!!
I wish i could say what i did and it worked but i have absolutely no idea what was done differently.
Thanks all for your Help.
I will say i installed the drivers manually and just on the off chance i flashed it again with the file i downloaded last Night. I also flashed a recover trying to get it to load a recover so i could flash a zip file.
marti4578 said:
Hello Guys i have Fantastic News!!
I have no idea what i did different, However i have reflashed the German 4.3 on my GT-I9305 and this time to my Total Surprise it worked!!
I wish i could say what i did and it worked but i have absolutely no idea what was done differently.
Thanks all for your Help.
I will say i installed the drivers manually and just on the off chance i flashed it again with the file i downloaded last Night. I also flashed a recover trying to get it to load a recover so i could flash a zip file.
Click to expand...
Click to collapse
Which file can u specify pls and also which recovery also is wifi and data working
AMoizK said:
Which file can u specify pls and also which recovery also is wifi and data working
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Click to collapse
which file????:crying:
AMoizK said:
which file????:crying:
Click to expand...
Click to collapse
Please read the rules .
JJEgan said:
Please read the rules .
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Click to collapse
Can u point me to the rules
AMoizK said:
Can u point me to the rules
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Click to collapse
http://forum.xda-developers.com/announcement.php?f=256
5. Create a thread or post a message only once.
As a large forum, we don't need unnecessary clutter. You're free to edit your message as you like, so if you do not receive an answer, revisit your message and see if you can describe your problem better. Not everyone is online at the same time so it might take a while before you receive an answer. (Also refer to Rule 16)
Finally
I am so feeling sucessful right now although i didnt got 4.3 but i was sucessful in getting my imei and baseband and network back.:good:
Sorry for the late response but when you get stuck on the Samsung boot screen all you have to do is boot into Recovery and do a Factory Reset and Wipe Cache.
Another thing to remember is to flash the modem for your country otherwise you might accidently disable some frequencies and enable other useless ones.
xkwizt said:
Sorry for the late response but when you get stuck on the Samsung boot screen all you have to do is boot into Recovery and do a Factory Reset and Wipe Cache.
Another thing to remember is to flash the modem for your country otherwise you might accidently disable some frequencies and enable other useless ones.
Click to expand...
Click to collapse
Doesn't work I will syill be stuck at boot screen
AMoizK said:
Doesn't work I will syill be stuck at boot screen
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Click to collapse
Which 4.3 update did you flash? I used the DBT German one.
Did you flash the right modem too? It worked for me and i was using a i9305T. All i did was flash the latest modem (from the brand of phone i have which is Telstra) and did a wipe data and wipe cache.

my one plus 3t is bricked unbricked using msmtool but now i cant install or update

my one plus 3t is bricked unbricked using msmtool but now i cant install or update the ROM into it.. please help me can someone help me using team viewer please or a remote might also help me.. please help me no wifi and bluetooth too as of now.
avnash09 said:
my one plus 3t is bricked unbricked using msmtool but now i cant install or update the ROM into it.. please help me can someone help me using team viewer please or a remote might also help me.. please help me no wifi and bluetooth too as of now.
Click to expand...
Click to collapse
not even a single reply.. this is not the way to treat a new member thanq
avnash09 said:
not even a single reply.. this is not the way to treat a new member thanq
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Click to collapse
There are a couple of reasons for people not replying.
First of all, the lack of details on your problem makes it impossible to determine the solution.
1. What do you mean bricked? Bootloop? Stuck on OnePlus logo? Hard brick? How did you get it bricked in the first place?
2. The restore tool removes TWRP. Have you installed it again?
3. What do you mean you can't install or the update the ROM? Is there an error message? Are you trying to flash a custom ROM in the stock recovery?
4. You waited less than 2 hours. You realize there are different time zones? Some people are sleeping, others are at work.
ast00 said:
There are a couple of reasons for people not replying.
First of all, the lack of details on your problem makes it impossible to determine the solution.
1. What do you mean bricked? Bootloop? Stuck on OnePlus logo? Hard brick? How did you get it bricked in the first place?
2. The restore tool removes TWRP. Have you installed it again?
3. What do you mean you can't install or the update the ROM? Is there an error message? Are you trying to flash a custom ROM in the stock recovery?
4. You waited less than 2 hours. You realize there are different time zones? Some people are sleeping, others are at work.
Click to expand...
Click to collapse
hi ,
i am a newbie here . my phone gets heated up after the ota install of 4.1.6 so i thought of factory resetting it. after resetting it. it got struck on the one plus logo and started booting again and again. so one of my friend asked to check the forum and i used [UNBRICK] Unbrick Tutorial For The OnePlus 3T!!!!!!!!! by Haris K. from the forum. it installed the os sucessfully. but i couldnt find wifi and bluetooth buttons enabled. so i thought of installing new roms but it gets struck on the one plus logo.. please help me. thanks in advance
avnash09 said:
not even a single reply.. this is not the way to treat a new member thanq
Click to expand...
Click to collapse
Hey you self-entitled prick, transfer a copy of the full ROM onto your phone through adb/USB OTG/MTP and flash it through the stock recovery. If you had previously unlocked your bootloader and have TWRP installed, use that to flash instead. If you do not know what any of the above means, look for it yourself through the forums.
Anova's Origin said:
Hey you self-entitled prick, transfer a copy of the full ROM onto your phone through adb/USB OTG/MTP and flash it through the stock recovery. If you had previously unlocked your bootloader and have TWRP installed, use that to flash instead. If you do not know what any of the above means, look for it yourself through the forums.
Click to expand...
Click to collapse
after flashing the rom i am getting a message decryprtion unsuccessful. the password is correct but the data is corrupt how to bypass this message
avnash09 said:
after flashing the rom i am getting a message decryprtion unsuccessful. the password is correct but the data is corrupt how to bypass this message
Click to expand...
Click to collapse
Get into the stock recovery and wipe both cache and userdata partitions before proceeding to troubleshoot further.
fareed_xtreme said:
Get into the stock recovery and wipe both cache and userdata partitions before proceeding to troubleshoot further.
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Click to collapse
after doing so my OS has started but wifi and bluetooth are greyed out. persist folder cannot find any data
.bt_nv.bin
WCNSS_qcom_wlan_nv.bin
WCNSS_qcom_wlan_nv_calibration_persist.bin
WCNSS_qcom_wlan_nv_regulatory_persist.bin
no file exists .. is the answer i get
avnash09 said:
after doing so my OS has started but wifi and bluetooth are greyed out. persist folder cannot find any data
.bt_nv.bin
WCNSS_qcom_wlan_nv.bin
WCNSS_qcom_wlan_nv_calibration_persist.bin
WCNSS_qcom_wlan_nv_regulatory_persist.bin
no file exists .. is the answer i get
Click to expand...
Click to collapse
Reflash with the MSMtool after re-downloading everything and verifying all downloads first before proceeding. Use the tool I have posted at https://forum.xda-developers.com/oneplus-3t/how-to/guide-official-op3t-stock-reset-to-oos-t3598864
Ensure you verify before starting the flash. Also uninstall or deactivate any anti virus application installed on your PC.
should i change the data partitions and everything to f2fs or other thing. system to ext4 data to f2fs
For now, don't worry about the data partitions. As mentioned above, reflash from MSMTools, verify the downloaded package first, and then check. All your issues are probably caused by a bad file.

None of the custom roms are booting

Hey everyone! I have a weird problem. I have rooted my Honor 5C NEM-L21 but everytime i try to flash a custom rom it gets bootlooped. I have tried multiple different roms and formatting /data as f2fs , yet have the same problem everytime that i flash a custom ROM. I have as well everytime downgraded the OS back to EMUI 4 and updated the OS to EMUI 5 but it does not help with the problem. Does anyone have any idea what might cause this problem? Thanks
onnz423 said:
Hey everyone! I have a weird problem. I have rooted my Honor 5C NEM-L21 but everytime i try to flash a custom rom it gets bootlooped. I have tried multiple different roms and formatting /data as f2fs , yet have the same problem everytime that i flash a custom ROM. I have as well everytime downgraded the OS back to EMUI 4 and updated the OS to EMUI 5 but it does not help with the problem. Does anyone have any idea what might cause this problem? Thanks
Click to expand...
Click to collapse
Don't use the original TWRP
AlexMihai26 said:
Don't use the original TWRP
Click to expand...
Click to collapse
I have used HassanMirza01's TWRP everytime when flashing, that should be the correct one right?
onnz423 said:
I have used HassanMirza01's TWRP everytime when flashing, that should be the correct one right?
Click to expand...
Click to collapse
It should be,it depends if you want to flash one of his roms.I'm using Lineage with the latest TWRP and it's working .
AlexMihai26 said:
It should be,it depends if you want to flash one of his roms.I'm using Lineage with the latest TWRP and it's working .
Click to expand...
Click to collapse
Yeah, not sure what im doing wrong then. Maybe i should try to reflash the kernel after flashing the ROM. This phone is pretty painful to mod if you ask me
onnz423 said:
Yeah, not sure what im doing wrong then. Maybe i should try to reflash the kernel after flashing the ROM. This phone is pretty painful to mod if you ask me
Click to expand...
Click to collapse
I have the same problem, i tried it several times but never worked. I gave up and instaled OctRom form felix-development after all...
onnz423 said:
Yeah, not sure what im doing wrong then. Maybe i should try to reflash the kernel after flashing the ROM. This phone is pretty painful to mod if you ask me
Click to expand...
Click to collapse
Try the stock kernel.I did that to make Lineage work,or you could try first to install elite rom then the rom that you want.

Stuck at Bootlogo after taking OTA!

I have a brand new N950F software version- {N950FXXS3CRF1}
After upgrading To {N950FXXU3CRF4}
Phone won’t pass the boot screen it’s just stuck on Logo! Getting dm-verity error
Even though the system is 100% stock!
I wiped the phone still same/! Even reflash with odin package{
N950FXXU3CRF4} still same/! The phone only boot after flashing back to the old version {N950FXXS3CRF1}
And again if i take the OTA it will stuck on bootlogo again?
What is actually wrong with this phone!
Confused/! Any help will be a lot appreciated/!
Thx/!
Did you use Odin 3.13?
Older versions could cause problems
Of course!
j_hansen said:
Did you use Odin 3.13?
Older versions could cause problems
Click to expand...
Click to collapse
Yes I tried with latest odin/!
But even the OTA will kill the phone/!
After taking official OTA/! phone stuck at bootlogo/!
I don’t know why but I’m getting dm-verity error after ota installation completed/! Even though the system is 100% stock!
Sooo much confused
Sorry I'm no expert but is there by any chance an sd card in the phone, those seem to cause all sorts of weird unexplained errors as well if corrupted
No!
j_hansen said:
Sorry I'm no expert but is there by any chance an sd card in the phone, those seem to cause all sorts of weird unexplained errors as well if corrupted
Click to expand...
Click to collapse
There is no sdcard/!
Did you try and download one off web and try instead of ota. Says dm-verity failed seems like bad download or mismatched firmware.
Yes/!
Amos420en said:
Did you try and download one off web and try instead of ota. Says dm-verity failed seems like bad download or mismatched firmware.
Click to expand...
Click to collapse
Yes i flash same package with odin and same result/!
The update failed. you need to reinstall using odin.
No matter/!
me2151 said:
The update failed. you need to reinstall using odin.
Click to expand...
Click to collapse
I completely flash the entire package with odin:!
But after flash complete phone will stuck at bootlogo!
Phone will only boot after downgrading to (RF1)
and i take the same OTA again it’s throwing dm-verity error
If its brand new, take it back where you bought and get it replaced..
Need Advice!
wase4711 said:
If its brand new, take it back where you bought and get it replaced..
Click to expand...
Click to collapse
July security patch is out
With build number-N950FOLN4CRG1 should i flash it with odin?
M just asking bcz if it stuck at bootlogo after flashing this package i will not be able to downgrade bcz of the updated bootloader-/!
What’s your advice?
pixel989 said:
July security patch is out
With build number-N950FOLN4CRG1 should i flash it with odin?
M just asking bcz if it stuck at bootlogo after flashing this package i will not be able to downgrade bcz of the updated bootloader-/!
What’s your advice?
Click to expand...
Click to collapse
I'd be wary of flashing N4. Are you using USB 3.0 I've read it can bork things up. Or try another version of oden. Otherwise I'd do as wase said and take bace to store see if they can help or replace.
pixel989 said:
July security patch is out
With build number-N950FOLN4CRG1 should i flash it with odin?
M just asking bcz if it stuck at bootlogo after flashing this package i will not be able to downgrade bcz of the updated bootloader-/!
What’s your advice?
Click to expand...
Click to collapse
Stop flashing stuff; you obviously dont know what you are doing
If its a brand new phone like you say it is, return it where you bought it and get a new one
And dont just flash things to your 1000 dollar device unless you are 100% sure of what you are doing..
wase4711 said:
Stop flashing stuff; you obviously dont know what you are doing
If its a brand new phone like you say it is, return it where you bought it and get a new one
And dont just flash things to your 1000 dollar device unless you are 100% sure of what you are doing..
Click to expand...
Click to collapse
Thanks for your advice!
I am 100% sure! What i am doing! That's why i didn't flash it yet! I m just asking for advice!
That's why i m out of there where i bought it!
Thanks!
if you actually were 100% SURE of what you are doing, you wouldn't have to keep asking the same question over and over
wase4711 said:
if you actually were 100% SURE of what you are doing, you wouldn't have to keep asking the same question over and over
Click to expand...
Click to collapse
M 100% sure about flashing stuff! Not about this problem!, that's why i m here asking for your help!

Project Treble? Working?

Hello everyone,
is it possible to Flash a treble Rom with unlocked Bootloader?
Do i need twrp also?
If it is possible i will try to install all Apps from the global rom to the treble Rom.
Greets
florian-m19 said:
Hello everyone,
is it possible to Flash a treble Rom with unlocked Bootloader?
Do i need twrp also?
If it is possible i will try to install all Apps from the global rom to the treble Rom.
Greets
Click to expand...
Click to collapse
I think yes, but I'm not sure
Was wondering the same thing, does anyone know if the red magic 3 is A only or an A/B device. I'm pretty sure it's A only, but I couldn't find any documentation online.
Its A only i think.
Hum... So Project Treble should work ?
That is interesting !
If I could install Resurrection Remix to this device and provided everything works it would become really almost perfect.
If anyone wants to try... If not I'll do it myself when I have time (in 2 or 3 days)...
Regards.
If the device has treble support, meaning a vendor partition it should work no problem, a/b partitioning is really not required for treble.
I tested treble using fastboot, since twrp had some issues, but it resulted in a bootloop and a corrupted recovery partition. I managed to fix it by following: https://forum.xda-developers.com/red-magic-3/help/stuck-fastboot-mode-t3937527/page9
Twrp gave me a mounting error for
/system_root, which is fixable by setting system to be read-only and then rebooting the recovery and re enableing read/write. Have not had the time to test using twrp and treble yet.
*I posted earlier in the day but managed to fix all the issues I had, so this a better summary :silly:
trepKep said:
I tested treble using fastboot, since twrp had some issues, but it resulted in a bootloop and a corrupted recovery partition. I managed to fix it by following: https://forum.xda-developers.com/red-magic-3/help/stuck-fastboot-mode-t3937527/page9
Twrp gave me a mounting error for
/system_root, which is fixable by setting system to be read-only and then rebooting the recovery and re enableing read/write. Have not had the time to test using twrp and treble yet.
*I posted earlier in the day but managed to fix all the issues I had, so this a better summary :silly:
Click to expand...
Click to collapse
So, this means its not working.. Sad Story.
florian-m19 said:
So, this means its not working.. Sad Story.
Click to expand...
Click to collapse
Well not necessarily, since I flashed the lineageos gsi through fastboot. (That may be the issue) I was having issues with twrp. I will try again today, although the chances are slim.
trepKep said:
Well not necessarily, since I flashed the lineageos gsi through fastboot. (That may be the issue) I was having issues with twrp. I will try again today, although the chances are slim.
Click to expand...
Click to collapse
U should clear user data and cache after installing new system if you have bootloop problem
Make sure its A only GSI
em902566 said:
U should clear user data and cache after installing new system if you have bootloop problem
Make sure its A only GSI
Click to expand...
Click to collapse
I'll keep that in mind
trepKep said:
I'll keep that in mind
Click to expand...
Click to collapse
Hey, did you try it again?
florian-m19 said:
Hey, did you try it again?
Click to expand...
Click to collapse
No, I was busy. But I'm trying right now
Treble Attempt #2
No luck, everything flashed with no errors, but all I get is more than 10 minutes of black screen. I also tried flashing magisk right after the gsi finished, same result.
trepKep said:
Treble Attempt #2
No luck, everything flashed with no errors, but all I get is more than 10 minutes of black screen. I also tried flashing magisk right after the gsi finished, same result.
Click to expand...
Click to collapse
Hmm then we must wait for a custom Rom..
florian-m19 said:
Hmm then we must wait for a custom Rom..
Click to expand...
Click to collapse
Yeah, a one plus 7 pro port would be nice
florian-m19 said:
Hello everyone,
is it possible to Flash a treble Rom with unlocked Bootloader?
Do i need twrp also?
If it is possible i will try to install all Apps from the global rom to the treble Rom.
Greets
Click to expand...
Click to collapse
Word of advice. Do not attempt to flash anything on this cell. You will regret it. I tried to flash TWRP over 6 weeks ago an it's been dead ever since. Even a cellphone repair center guy could not repair it.
You need to leave good enough alone.
People all around the world have been stuck in permanent recovery screens or fastboot screens like me.
It really is a very good cell the way it is ?
Bryceicle1971 said:
Word of advice. Do not attempt to flash anything on this cell. You will regret it. I tried to flash TWRP over 6 weeks ago an it's been dead ever since. Even a cellphone repair center guy could not repair it.
You need to leave good enough alone.
People all around the world have been stuck in permanent recovery screens or fastboot screens like me.
It really is a very good cell the way it is ?
Click to expand...
Click to collapse
Many people have faced the issue and they have recovered their device. Look for all solutions available.
danishajaz said:
Many people have faced the issue and they have recovered their device. Look for all solutions available.
Click to expand...
Click to collapse
I have. 7 weeks an counting an no working cell yet. I bought an Mi9 an no issues with it. Easy to reinstall firmware. The red magic 3 is the most difficult to repair cell I have ever encountered. I wish they had something like miflashpro for it
Treble is working from chinese ROM with twrp make sure image is A/B because this device is A/B

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