Tectlast M40 Need help unbrick - Android Q&A, Help & Troubleshooting

Background:
I tried flashing Teclast M40Pro's firmware to the tablet in hope of it working on Teclast M40, but unfortunately bricked the tablet.
Status:
It's not totally bricked. Actually I am sure that the system booted because I can browse external storage of the tablet when I plug an USB cable to the computer. The problem is that the screen does not work (both display and touch). Now I am having problem flashing back to factory image.
What I have tried is holding power button of the tablet until it reboot and then hold the volume down button, but the tablet doesn't enter factory flash mode instead it boot normally.
More Info:
The bootloader is unlocked.
Need help:
1. How to enable developer mode without needing the screen so that I can command the tablet with adb?
2. How to boot to recovery with hardware button? This link's (https://droidrecovery.com/teclast-m40-recovery-mode/ ) method doesn't seem working. If it does work, please provide more details (Like how many seconds I need to wait and how many times I need to press the button to select the recovery mode).
3. Any other methods not mentioned above.

I finally work out the solution.
Generally the last method mentioned by siamese007 works.
siamese007 said:
1. Open SPD flash tool for M40 and load M40 firmware.
2. click Start downloading button.
3. hold vol down + power to turn off.
4. SPD flash tool will start flashing the firmware to M40.
Click to expand...
Click to collapse
However, it's more tortuous than it seems.
The first problem I met was failing to flash back M40 firmware with error flashing _BKF_NV_LTE.
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I solved the problem by using ResearchDownload tool instead of UpgradeDownload tool with which I could skip flashing _BKF_NV_LTE in the settings menu.
The flashing succeeded and the system booted, but here came the second problem. The system could not recognize the IMEI and what even worse was the system would crash and reboot within a few minutes. This was reasonable as I skiped flashing _BKF_NV_LTE.
The problem was solved by flashing _BKF_NV_LTE manually with fastboot.
Code:
fastboot flash l_fixnv1 sharkl5pro_pubcp_customer_nvitem.bin

@AnKHqz, where did you get a copy of Teclast M40 Pro firmware? Mind sharing it?

kchung said:
where did you get a copy of Teclast M40 Pro firmware? Mind sharing it?
Click to expand...
Click to collapse
M40 Pro(M1A1)_Android11.0_EEA
M40Pro(M1A1)_Android11.0_ROW

AnKHqz said:
Finalmente encontrei a solução.
Geralmente, o último método mencionado por siamese007 funciona.
No entanto, é mais tortuoso do que parece.
O primeiro problema que encontrei foi não conseguir fazer o flashback do firmware M40 com o erro de flashing _BKF_NV_LTE.
View attachment 5400005
Resolvi o problema usando a ferramenta ResearchDownload em vez da ferramenta UpgradeDownload, com a qual pulei a exibição de _BKF_NV_LTE no menu de configurações.
View attachment 5400009
O flashing foi bem-sucedido e o sistema inicializou, mas aí veio o segundo problema. O sistema não conseguia reconhecer o IMEI e o que é ainda pior é que o sistema travava e reiniciava em poucos minutos. Isso foi razoável, já que pulei o piscar de _BKF_NV_LTE.
O problema foi resolvido atualizando _BKF_NV_LTE manualmente com o fastboot.
[CÓDIGO] fastboot flash l_fixnv1 sharkl5pro_pubcp_customer_nvitem.bin [/ CODE]
Click to expand...
Click to collapse
Eu tenho esse problema BKF_NV_LTE
Eu não consegui resolver isso. Precisa o bootloader desbloqueado? Ou você tem um link para eu tentar. Você me ajudaria?

1. To skip the _BKF_NV_LTE step that failed, you need to use the SPD Research Tool. Launch the tool, select the firmware and uncheck NV_LTE in the settings menu, then you should flash the fireware without error. The tool can be downloaded from https://spdflashtool.com/research-tool/spd-research-tool-r21-0-0001.
2. To make the system fully functional, you need to manually flash the file skipped in step 1. This require the bootloader to be unlocked. The unlocking method is available on https://forum.xda-developers.com/t/teclast-m40-how-to-unlock-bootloader.4185363/.

AnKHqz said:
The flashing succeeded and the system booted, but here came the second problem. The system could not recognize the IMEI and what even worse was the system would crash and reboot within a few minutes. This was reasonable as I skiped flashing _BKF_NV_LTE.
The problem was solved by flashing _BKF_NV_LTE manually with fastboot.
Code:
fastboot flash l_fixnv1 sharkl5pro_pubcp_customer_nvitem.bin
Click to expand...
Click to collapse
Hi!I
I did the same stupid thing with the m40 pro firmware...
The first step to fix it worked, thanks!! But for the second problem, I cannot use the fastboot since my bootloader is blocked and I don't know how to unlock it, I read the guides but I don't have access to linux.
I just want the tablet to work again. Could you help me?
Thank you so much!

fernando823 said:
Hi!I
I did the same stupid thing with the m40 pro firmware...
The first step to fix it worked, thanks!! But for the second problem, I cannot use the fastboot since my bootloader is blocked and I don't know how to unlock it, I read the guides but I don't have access to linux.
I just want the tablet to work again. Could you help me?
Thank you so much!
Click to expand...
Click to collapse
It's been a while since I unlocked my bootloader, so I don't remember the details of how to unlock the bootloader, but I would suggest trying a Linux VM or WSL.

There is another method by Dtechflix in youtube. Download SPD_Research_Tool and run "ResearchDownload.exe".
Load the pac file (M40) -> click option button (2nd from left) -> Click "Backup" -> untick "NV_LTE" and "ProdNV" at the bottom -> Click "OK" -> Click "Update icon" (3rd from left) and proceed with the remaining steps as normal for flashing.

Related

[Q] HUAWEI MediaPad 7 Youth S7-702u

Good morning / afternoon, I have a problem with a MediaPad (S7-702U), does not pass to the startup logo and and and tried the master reset and nothing, I was wondering if anyone had the software stock for this tablet or any solution for this problem.
Many thanks.
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picado3 said:
Good morning / afternoon, I have a problem with a MediaPad (S7-702U), does not pass to the startup logo and and and tried the master reset and nothing, I was wondering if anyone had the software stock for this tablet or any solution for this problem.
Many thanks.View attachment 2571931
Click to expand...
Click to collapse
did you solved the problem?
Unfortunately it can not resolve
picado3 said:
Unfortunately it can not resolve
Click to expand...
Click to collapse
try this.
1. Press and hold the power button + volume up + volume down.
2. When you feel the vibration,release the power button.
3. When the Android logo appears, release the volume up.
4. You will see some running lines in the Android logo, hold still the volume down and wait for 10 seconds then release it.
5. Then let it reboot by itself.
6. Hard reseting done.
it work with my s7-702u
picado3 said:
Unfortunately it can not resolve
Click to expand...
Click to collapse
Thanks a Friend from Costa Rica i find a firmware for s7-702u
https://mega.co.nz/#F!e180xRyT!EyBPDfovW6zHPb71Sz_eAg
follow the instructions inside the pdf in zip
Install this and your s7-702u will be operative again
If you need more s7-701u/s7-702u information, goto this post
Can i install s7 702u firmware to s7 701u
hello please somebody can help me..i need the rom for s7-702u because the tablet when boot it stuck in the carrier logo..please only the rom can save me..i know the s7-701u can solve mi problem but that is the problem too i can't install the vrcb.img because the tablet cant boot the problem is no pass from teh carrier logo,,,i tried the rockchip tool ,rk android tool,,,and when i tri¿y to install the s7-701u fw the tool says test device start,test device fail.
help me please, help,thanks.
Chamo, puedes cuadrarme ese sistema? Tengo una s7 702u pero se queda en el logo de movilnet, ya hice el hard reset pero nada... No consigo en monagas nadie que tenga ese soft. Para que me la reviva aunque sea por un ojo de la cara. Adoro mi tablet-celular no podré morir en paz :C
Jota2740 said:
Chamo, puedes cuadrarme ese sistema? Tengo una s7 702u pero se queda en el logo de movilnet, ya hice el hard reset pero nada... No consigo en monagas nadie que tenga ese soft. Para que me la reviva aunque sea por un ojo de la cara. Adoro mi tablet-celular no podré morir en paz :C
Click to expand...
Click to collapse
Descarga el firmware de este enlace
Descomprime el zip y sigue las intrucciones que estan en el pdf

[ROM][10.14291.1001] Windows 10 Mobile Redstone Build

Hello after Microsoft rummor of getting out x20 phones of official w10 mobile and the first Redstone build 14291 for 650 and 950 phones i decided to may a litle hack to phone insider RM and get new 10.14291.1001 build on non supported phone...
ROM works well at the moment, i have dirty flash it from a old win10 build, i need a few reboots for getting it completly updated and working...
Only bug phone is that WIFI after power phone off will need to clik wifi anohter time or input password again, maybe is fall of dirty flash rom.
Video:
General video of build on other phone:
Lumia 920 running 14291:
Screnshoot:
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Recommend:
Relock bootloader
Clean flash of stock ffu wp8.1 rom update it to lastest wp8.1 rom abalible...
Unlock bootloader and then install rom with WP Internals allways lastest version avalible
Download:
WP Internals:http://forum.xda-developers.com/windows-phone-8/development/windows-phone-internals-unlock-t3257483
ROM:https://mega.nz/#!pk4T2ZSQ!gIVstUuNYqR9_XvGQAuXDbE6hOw_ya2bQrXcXCen3Zk
NOOB GUIDE:http://www.htcmania.com/showthread.php?t=1117738
lo probaré a ver que tal...
Gracias máquina!
dari-woka said:
lo probaré a ver que tal...
Gracias máquina!
Click to expand...
Click to collapse
Como hago el Flash de la Rom
me quede en este paso :
Relock bootloader
Clean flash of stock ffu wp8.1 rom update it to lastest wp8.1 rom abalible...
Unlock bootloader.
Saludos
edmajeja said:
Como hago el Flash de la Rom
me quede en este paso :
Relock bootloader
Clean flash of stock ffu wp8.1 rom update it to lastest wp8.1 rom abalible...
Unlock bootloader.
Saludos
Click to expand...
Click to collapse
Do not speak spanish because they are going to penalize you at least use the two lenguages...
No uséis español porque os van a penalizar en xda , ya que el ingles es la lengua oficial del foro, si usáis las dos creo que no pasa nada
En este link esta todo puesto en español: http://www.htcmania.com/showthread.php?t=1117738
what would happen if there was an update released for redstone? would it put the phone in any risk of being bricked?
WewLads said:
what would happen if there was an update released for redstone? would it put the phone in any risk of being bricked?
Click to expand...
Click to collapse
Is supposed that as originally 920 is not supported it will not update , but allways there is a risk, put manually update and wiat for feedback in the case this happens
Is it rooted/rootable?
After flash i stuck in Nokia logo, and i must recovery my Lumia 920 back to 8.1. :crying:
Good morning , when Microsoft releases updates, you also get the crucial rom ?
barabl said:
After flash i stuck in Nokia logo, and i must recovery my Lumia 920 back to 8.1. :crying:
Click to expand...
Click to collapse
Ohh maybe they have block this update method rom....
You can still use redstone changing RM to 950 one
Stop in logo nokia
hi,
i'd flash my lumia 920 with rom 10.14291.1001 and it stop to nokia logo !!!
do you have an idea?
thanks !!!
jjcaix said:
hi,
i'd flash my lumia 920 with rom 10.14291.1001 and it stop to nokia logo !!!
do you have an idea?
thanks !!!
Click to expand...
Click to collapse
I think tehy have bolck thsi method so we cant used it change rm for recive redstone build
Hello werty100, I have a Lumia 1020, and I saw there is no activity in its forum. Could you do a Redstone ROM for this phone? At least, the tutorial on how to cook the ROM (like the one you posted in htc-mania about jailbreaking it; btw, very nice!). Thanks!
In spanish: Hola werty100, tengo un Lumia 1020 y vi que en el foro de xda no hay actividad. Me preguntaba si podrias cocinar una ROM redstone para este telefono? O por lo menos hacer un tuto al respecto sobre como hacer estas ROM (similar al que hiciste en htcmania, que por cierto muy bueno). Muchas gracias!!
WPinternals crash
WPinternals crahshed after boot phone to flash, any files don't write to phone.
Lumia 920 059Q805
Win7 x64
Could you make a 14342 rom for the 920? Would love to try that. Your tutorial is in spanish will try google translate in a minute but what does it say?
hi, my Lumia 920 too suck in nokia logo after flashing the mainos and data file using wpinternals
had to recover using the windows device recovery tool
Hi guys, finally I tweaked Lumia 920's mobile registry to make it look like a Lumia 950 and accomplished with the latest redstone update.
He is the procedure which I did and have posted in another thread.
Try it at your own risk.
PIN?
I successful installed your rom, but I need your PIN (like system password, not Pin from sim) to continue using my phone.
Could you give me, please?
Thanks in advance.
PD.: Nicely dog in a beautiful beach!
Hi Does this ROM have Glance working on it & Mass Storage mode..?
about ROM
I have downloaded and extracted the ROM which its link is given here. I extracted it and now I have three file with *.bin extentions. Now I don't know what should I do with them. there are no *.ffu to flash. please help me! it was so difficult to download a file with 6 GB size.

blank flash for moto g8 power 2041-1

Hello friends. can anybody help me? I tried to change the rom of my smartphone and it was in "hardbrick", in which its screen does not light up, just a simple LED on its top. The device is recognized by windows in the device manager as "qualcomm hs-usb qdloader 9008". However, I can't do the blankflash correctly. Does anyone have the correct file for this model?
i have the same problem looking for a solution
smlaraujo said:
Hello friends. can anybody help me? I tried to change the rom of my smartphone and it was in "hardbrick", in which its screen does not light up, just a simple LED on its top. The device is recognized by windows in the device manager as "qualcomm hs-usb qdloader 9008". However, I can't do the blankflash correctly. Does anyone have the correct file for this model?
Click to expand...
Click to collapse
i have the same problem looking for a solution
The same thing happened to me, I'm waiting for a solution
this is a blankflash made by a brazilian and it works 100%...after this you have to flash the latest firmware for your device, they will stay in antiroolback, but it will work
https://drive.google.com/file/d/1mHVOjqMyUJJeCkUPaf2YfUwf_tLykiSm/view?usp=sharing
you just have to connect your phone and have it recognized by the pc and double click on the .bat file
kuzo said:
este é um blankflash feito por um brasileiro e funciona 100%...depois disso você tem que fazer o flash do firmware mais recente para o seu aparelho, eles vão ficar no antiroolback, mas vai funcionar
https://drive.google.com/file/d/1mHVOjqMyUJJeCkUPaf2YfUwf_tLykiSm/view?usp=sharing
você só precisa conectar seu telefone e reconhecê-lo pelo pc e clicar duas vezes no arquivo .bat
Click to expand...
Click to collapse
it worked bro, thank you very much
funcionou brother, muito obrigado
Rurielson said:
funci
kuzo said:
este es un flash en blanco hecho por un brasileño y funciona al 100%...después de esto tienes que flashear el último firmware para tu dispositivo, permanecerán en antiroolback, pero funcionará
https://drive.google.com/file/d/1mHVOjqMyUJJeCkUPaf2YfUwf_tLykiSm/view?usp=sharing
solo tienes que conectar tu telefono y que lo reconozca la pc y hacer doble clic en el archivo .bat
Click to expand...
Click to collapse
ono hermano muchas gracias
Click to expand...
Click to collapse
My cell phone does not recognize it, the pc already installed the motorola drivers and qualcoom appears "waiting device"
ezeqrodr01 said:
Meu celular não reconhece, o pc já instalou os drivers motorola e qualcoom aparece "aguardando dispositivo"
Click to expand...
Click to collapse
you have to do the EDL Point method, you have to open the cell phone and press the two pins, then your device will be recognized on the pc. Then just flash
hello friends, it flashes correctly but it restarts with a white led without response. any solution? thanks geniuses
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i have this problem, i used a bankflash but i got an error as you can see 'Error: sahara_downliad (). If you can find another bankflash that actually works, i will always be grateful.
lolinet mirrors - firmware, software, iso etc.
lolinet mirrors - powered by h5ai
mirrors.lolinet.com

ROOT XT2095-1 MOTO E7 SUCCESS

i managed to unlock the xt2095-1 bootloader but at the same time i corrupted imei
I need your help so I can continue my work
MY TELEGRAM: Mod edit: TG link removed.
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View attachment 5650923
Como você Conseguiu desbloquear o bootloader do moto e7? poderia me ajudar?
Mod translation: How did you manage to unlock moto e7 bootloader? Would you help me?
Moto E7 Malta said:
Como você Conseguiu desbloquear o bootloader do moto e7? poderia me ajudar?
Mod translation: How did you manage to unlock moto e7 bootloader? Would you help me?
Click to expand...
Click to collapse
In my case, I was able to unlock it by writing the lolinet stock rom (retbr latest patch released.) with that, I used the mtkclient unlock method normally. to my surprise, after restarting the device, I saw the message that the bootloader was unlocked
~~and sorry for my bad english.~~
e eu queria muito desbloquear o meu, poderia me explicar passo a passo?
Maizon_original said:
i managed to unlock the xt2095-1 bootloader but at the same time i corrupted imei
I need your help so I can continue my work
MY TELEGRAM: Mod edit: TG link removed.
View attachment 5650921View attachment 5650923
Click to expand...
Click to collapse
Maizon, how did you manage to install magisk? on my device it always had bootloops after writing the kernel.
Moto E7 Malta said:
e eu queria muito desbloquear o meu, poderia me explicar passo a passo?
Click to expand...
Click to collapse
Unfortunately I couldn't understand if my method works. Also, with the IMEI lost, you no longer have access to the cellular network.
Also, please only write English in the forums. This makes mods very happy.
What did I do:
- Using SP Flash Tool, I rewrote the stock ROM.
- Then I used mtkclient with the command:
Bash:
mtk da seccfg unlock
- Note that I use linux. The way you invoke mtk is different by platform.
- On reboot, if you get the message (Orange State), you've nailed it.
oi eu tenho esse celular e vi que o cpu dele é 64 bits so que a rom stock é 32bits. A minha duvida é se é possível instalar uma rom 64bits nele pq vi que existe várias stocktoms dele em 64 bits mais quando flashada não funciona
gffhgf said:
oi eu tenho esse celular e vi que o cpu dele é 64 bits so que a rom stock é 32bits. A minha duvida é se é possível instalar uma rom 64bits nele pq vi que existe várias stocktoms dele em 64 bits mais quando flashada não funciona
Click to expand...
Click to collapse
simple hint: speak english in xda threads. Mods will be happy.
And check if your kernel is 64-bit. Because, in my decide, ships a 64-bit ROM.
In fact, it is possible to write the corresponding A/B ROM via fastbootd.
Aisu_MaltaClub said:
simple hint: speak english in xda threads. Mods will be happy.
And check if your kernel is 64-bit. Because, in my decide, ships a 64-bit ROM.
In fact, it is possible to write the corresponding A/B ROM via fastbootd.
Click to expand...
Click to collapse
I'm new here, I need help to repair imei of my moto e7, any solution found
Aisu_MaltaClub said:
In my case, I was able to unlock it by writing the lolinet stock rom (retbr latest patch released.) with that, I used the mtkclient unlock method normally. to my surprise, after restarting the device, I saw the message that the bootloader was unlocked
~~and sorry for my bad english.~~
Click to expand...
Click to collapse
Unfortunately the mtk client did not help me, I try to see if I can both repair imei and unlock the bootloader with hydra tool
Leonismm said:
Unfortunately the mtk client did not help me, I try to see if I can both repair imei and unlock the bootloader with hydra tool
Click to expand...
Click to collapse
a question: before using mtkclient, have you tried to rewrite the stock ROM?
Ah, to fix IMEI, you can try with ModemMeta Tool...
Aisu_MaltaClub said:
a question: before using mtkclient, have you tried to rewrite the stock ROM?
Ah, to fix IMEI, you can try with ModemMeta Tool...
Click to expand...
Click to collapse
yes of course I overwrote it, but by accident I forgot to uncheck the preolader box
Aisu_MaltaClub said:
a question: before using mtkclient, have you tried to rewrite the stock ROM?
Ah, to fix IMEI, you can try with ModemMeta Tool...
Click to expand...
Click to collapse
I'll try in a while I'll report
Leonismm said:
I'll try in a while I'll report
Click to expand...
Click to collapse
brother the rom I have is 32 bits, in the mtk client I had problems with the handshake, how unfortunate
chow to unlock the bootloader Moto E7 64gb?
sorry to resurrect this topic but if anyone with workin imei could backup their nvdata and nvram, all of us could restore our imei numbers
dvijetrecine said:
sorry to resurrect this topic but if anyone with workin imei could backup their nvdata and nvram, all of us could restore our imei numbers
Click to expand...
Click to collapse
Tell me step by step how to do it and I'll give you my backup

the phone is not running samsung official software

Hi guys. I need help. I tried to install twrp through Odin. I forgot to put the same vbmeta. now the phone constantly has 2 inscriptions
1."The phone is not running Samsung’s official software. You may have problems with features or security. And you won’t be able to install software updates."
2."This phone’s bootloader is unlocked and the software integrity can’t be verified. Any data on this phone may be vulnerable to attackers. Don’t store any important or sensitive information on the phone."
The loader is open, but I can't get into it. Black screen. Even when I connect the phone to the computer, no action occurs. On charging - does not show whether the device is charging. All drivers are installed on the computer. Odin doesn't see him. Only the volume reduction and the power button work. Constant reboot. The other combinations don't work. Even the +/- hold also stopped responding when I plug in the usb. Before that, at least there was a black screen. As I know knox was turned off, I don't know if it's a 0x1 error.
Are there any solutions to this problem?
same problem here. did u find any solution? I tried to install the main firmware from samfw by odin, but it didn't work. Now I'm searching for the solution.
Same problem here, have u found any solutions?
Yes and it completely works. 1st of all go to download mode and then observe the upper left corner your base version is given . Note that version . And go to samfw to download to firmware match with your base version . Just apply that firmware with odin . Bl,ap,cp,cse apply all 4 of it . And that start . Wait until the pass sign appeared on your screen. Give some time to restart u r phone . Before everything else lock bootloader of u r phone first .
Tasin751 said:
Sim e funciona perfeitamente. Primeiro de tudo, vá para o modo de download e observe o canto superior esquerdo que sua versão base é fornecida. Observe essa versão. E vá para samfw para baixar o firmware compatível com sua versão base. Basta aplicar esse firmware com odin. Bl,ap,cp,cse aplicam todos os 4. E esse começo. Aguarde até que o sinal de passe apareça na tela. Dê algum tempo para reiniciar seu telefone. Antes de tudo, bloqueie o bootloader do seu telefone primeiro.
Click to expand...
Click to collapse
Já consegui fazer isso, agora o que fazer para instalar uma custom rom sem dar o mesmo erro.
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"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Tasin751 said:
Yes and it completely works. 1st of all go to download mode and then observe the upper left corner your base version is given . Note that version . And go to samfw to download to firmware match with your base version . Just apply that firmware with odin . Bl,ap,cp,cse apply all 4 of it . And that start . Wait until the pass sign appeared on your screen. Give some time to restart u r phone . Before everything else lock bootloader of u r phone first .
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SAdly it doesn't with every phone. i suspect it works with phones oaf a certain build and/ or a certain region. i can bootload my phone to the download screen using a differnet method than specified on most youtube videos. on there there's no base number. the firmware number i had to find on the about screen. aid firmware didn't exist on the samfw sire. i found it by search engining it.
fjb59 said:
SAdly it doesn't with every phone. i suspect it works with phones oaf a certain build and/ or a certain region. i can bootload my phone to the download screen using a differnet method than specified on most youtube videos. on there there's no base number. the firmware number i had to find on the about screen. aid firmware didn't exist on the samfw sire. i found it by search engining it.
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i thiink the answer you are looking for is here
[RECOVERY] [OFFICIAL] TWRP 3.6.x for Galaxy A10 Exynos series [SM-A105] [4 January 2022]
Team Win Recovery Project 3.x, or twrp3 for short, is a custom recovery built with ease of use and customization in mind. Its a fully touch driven user interface no more volume rocker or power buttons to mash. The GUI is also fully XML driven and...
forum.xda-developers.com
you have to hard reboot by long clicking volume down and power until screen goes off. when the screen go off press both volume buttons and connect USB before screen turns on again.
BrotherBoard said:
you have to hard reboot by long clicking volume down and power until screen goes off. when the screen go off press both volume buttons and connect USB before screen turns on again.
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i have the same problem and the screen just doesn't go black no matter how long i press vol down and power button

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