Database Users

Stuck at boot screen TWRP

Hii I have a open bootliader and TWRP 3.0.2-r3 on my phone and this morning recieved a update to android 7.0 I did that and it asked my to restart my phone when I restarted my phone got stuck at "Warning Bootloader Unlocked" screen
I couldnt restard it by pressing Vol down and power key.
it is stuck untill battery runs out
please help what to do.

vinaykeasri said:
Hii I have a open bootliader and TWRP 3.0.2-r3 on my phone and this morning recieved a update to android 7.0 I did that and it asked my to restart my phone when I restarted my phone got stuck at "Warning Bootloader Unlocked" screen
I couldnt restard it by pressing Vol down and power key.
it is stuck untill battery runs out
please help what to do.
Click to expand...
Click to collapse
You can't update modified firmware i must be stock for OTAs. If vol down + power key don't work, try this method (make sure battery is not drained out) - take your phone while it's off, press and hold vol down and vol up buttons together and plug it into computer via USB - it should boot in fastboot mode.

P9 Lite VNS-L31 bootloop, no recovery, no twrp , no bootloader

hello,
after install some rom, my p9 lite get bootloop. I manage to enter fastboot but phone was locked, so to install twrp i unlocked it.
After unlock i can't enter fastboot.
Screen "your devices has been unlocked and can't be trusted" appears, vol up+- power, nothing happens phone vibe 2 times and back to screen "your devices...".
My bootloader is unlock, can i flash twrp without bootloader screen on phone ? My phone is connected to PC but no device detected. Maybe at linux i can do something more than windows ?
Maybe i need to go to fastboot some different way ? i try to push 3 button after fist vibe and 2nd. Nothing work for me :crying:
i tried to past b130 to sd card in dload, vol+- power, nothing not even update screen, same "your devices"....,
now downloading b151

dragon218 said:
hello,
after install some rom, my p9 lite get bootloop. I manage to enter fastboot but phone was locked, so to install twrp i unlocked it.
After unlock i can't enter fastboot.
Screen "your devices has been unlocked and can't be trusted" appears, vol up+- power, nothing happens phone vibe 2 times and back to screen "your devices...".
My bootloader is unlock, can i flash twrp without bootloader screen on phone ? My phone is connected to PC but no device detected. Maybe at linux i can do something more than windows ?
Maybe i need to go to fastboot some different way ? i try to push 3 button after fist vibe and 2nd. Nothing work for me :crying:
i tried to past b130 to sd card in dload, vol+- power, nothing not even update screen, same "your devices"....,
now downloading b151
Click to expand...
Click to collapse
For fastbooting u need to use volume down and power in the same time and the phone needs to be connected to PC, and for entering to recovery u only need to press volume up and power key.

robi10101298 said:
For fastbooting u need to use volume down and power in the same time and the phone needs to be connected to PC, and for entering to recovery u only need to press volume up and power key.
Click to expand...
Click to collapse
phone is connected to pc. screen is on "your device..." i push vol down + power. screen going black vibe 2 times, 1 sec huawei logo and back to "your device..". I don't know why after unlock phone i can't go to fastboot
i it possible to erase fastboot ??!!

dragon218 said:
phone is connected to pc. screen is on "your device..." i push vol down + power. screen going black vibe 2 times, 1 sec huawei logo and back to "your device..". I don't know why after unlock phone i can't go to fastboot
Click to expand...
Click to collapse
Disconnect the phone from PC. Make sure it's powered off. Plug in USB cable at the same time while holding volume down.

zgomot said:
Disconnect the phone from PC. Make sure it's powered off. Plug in USB cable at the same time while holding volume down.
Click to expand...
Click to collapse
don't work, after power on still going to "your devices". Even change pc and usb cable
I can belived that i can open fastboot when phone was lock, after unlock fastboot vanished
dc-phoenix can help if pc dont see device ?

dragon218 said:
don't work, after power on still going to "your devices". Even change pc and usb cable
I can belived that i can open fastboot when phone was lock, after unlock fastboot vanished
dc-phoenix can help if pc dont see device ?
Click to expand...
Click to collapse
Don't work, after power on......why power on?
Disconnect from PC. Power of the phone.
Press and hold only vol down, with pressing vol down connect with PC. Device should be start on fastboot mode.
Sent from my NEM-L21 using Tapatalk

Anonda said:
Don't work, after power on......why power on?
Disconnect from PC. Power of the phone.
Press and hold only vol down, with pressing vol down connect with PC. Device should be start on fastboot mode.
Sent from my NEM-L21 using Tapatalk
Click to expand...
Click to collapse
in 5 min i will send video i think i'm doing everything right
if u can look at it
http://sendvid.com/svihvenb

No compatible source was found this video
Sent from my NEM-L21 using Tapatalk

Anonda said:
No compatible source was found this video
Sent from my NEM-L21 using Tapatalk
Click to expand...
Click to collapse
try this from yt
https://youtu.be/K36zMsaP4As

try putting update.app file into dload folder on your sdcard and updating via three button method.

sirjohnrl said:
try putting update.app file into dload folder on your sdcard and updating via three button method.
Click to expand...
Click to collapse
Try with b130 and b161 for region c432 nothing happened. 2 days ago i change region from c185 to c432 now i think maybe i need to past c185b161 to work ?
update doesn't start either, losing hope some one have any other ideas ?

dragon218 said:
try this from yt
https://youtu.be/K36zMsaP4As
Click to expand...
Click to collapse
On the starting, your phone is on.
Then you shutdown? How?
After power off
Press and hold only vol down, connect with pc.
Hi suit installed on your PC?
Sent from my NEM-L21 using Tapatalk

Anonda said:
On the starting, your phone is on.
Then you shutdown? How?
After power off
Press and hold only vol down, connect with pc.
Hi suit installed on your PC?
Sent from my NEM-L21 using Tapatalk
Click to expand...
Click to collapse
i hold power button, if phone isn't connected to pc he is going off. Think is because battery is very low, led is blinking in red.
Then I hold vol down and connect usb cable, but how u can see on video phone weak up and go to booting.
I have hi suit last night as i mention fastboot works, but need to unlock phone. After that "your devices" screen came out and can't fastboot anymore
When i turning off phone with connected usb i can't turn phone off. After a second phone power on by his own.
If phone is disconnected longer than 5 min, then i push vol down and connect usb only red lightening shows up. I need to wait a while to phone start.

dragon218 said:
i hold power button, if phone isn't connected to pc he is going off. Think is because battery is very low, led is blinking in red.
Then I hold vol down and connect usb cable, but how u can see on video phone weak up and go to booting.
I have hi suit last night as i mention fastboot works, but need to unlock phone. After that "your devices" screen came out and can't fastboot anymore
When i turning off phone with connected usb i can't turn phone off. After a second phone power on by his own.
If phone is disconnected longer than 5 min, then i push vol down and connect usb only red lightening shows up. I need to wait a while to phone start.
Click to expand...
Click to collapse
OK. When phone is off, if you connect with PC, phone should be start, but this is only for charging. May be, you don't have charge, so phone is not going to fastboot mode with vol down?
Now just connect the phone with PC for full charge.
You don't have any recovery? Custom or stock?
It can be happen?
Sent from my NEM-L21 using Tapatalk

Anonda said:
OK. When phone is off, if you connect with PC, phone should be start, but this is only for charging. May be, you don't have charge, so phone is not going to fastboot mode with vol down?
Now just connect the phone with PC for full charge.
You don't have any recovery? Custom or stock?
It can be happen?
Sent from my NEM-L21 using Tapatalk
Click to expand...
Click to collapse
When i start charge phone blinking red in led, after while phone vibe 1 time and go to booting now, but led don't stop blinking. I will try to charge it, but because of working screen, phone heat a lot i don't wanna burn it.
Before i made rollback and something gone very bad, emui update after 100 % phone don't boot up. Without usb cable i wasn't able to go recovery or fastboot. So i think i don't have any recovery i made backup of files with twrp but now i can't flash it.

after night without power, phone drain all of battery. Now i understood better what is going on. when i plugged usb cable, phone don't start bye it own, only red lighting flash for second .
I disconnect cable and connect it with vol down button how all of here wrote. Phone immediately weak up an go to "your device has been..".
It's look like after i unlock phone (bootloader) somehow i was able to corrupt bootloader files or even delete it. Some one can confirm that it is possible to crash bootloader ?

dragon218 said:
after night without power, phone drain all of battery. Now i understood better what is going on. when i plugged usb cable, phone don't start bye it own, only red lighting flash for second .
I disconnect cable and connect it with vol down button how all of here wrote. Phone immediately weak up an go to "your device has been..".
It's look like after i unlock phone (bootloader) somehow i was able to corrupt bootloader files or even delete it. Some one can confirm that it is possible to crash bootloader ?
Click to expand...
Click to collapse
I have the same situation. I tried everything, Three button method, letting the battery run out completely, Vol+ and Power, Vol- and Power, connected to PC, not connected to PC. Every time I disconnect the charger, and reconnect it starts from 0. I read some other people here have the same problem. Send it to warranty and explain your rollback process unlocked the bootloader somehow (I mean the phone does do a lot of sh*ty sh*t, so this shouldn't seem very odd as well!!!) and hope that you get a repair/replacement and after that sell it on ebay hoping some stupid people like us in the first place will buy it and spend your money on a phone more reliable!

I managed to access the fastboot using the 3 button method in cold boot. Hold the Power key until the screen goes off and then release and hold down the Vol- key and immideately connect the usb cable to PC right before it vibrates or exactly when it vibrates (it's a matter of timing), and bingo you are in fastboot and you can flash system.img, recovery.img, cust.img, cache.img and boot.img from there, but this is not how I revived my phone. I used the 3 button method again when the phone was charged for like half an hour or so and the did the same cold boot trick and I could boot into the force upgrade environment (strangely this still didn't work whitout connecting the usb cable to PC), but it somehow didn't want to read the UPDATE.APP that I had in dload folder on my SD card and wanted to have it from my PC (I just felt it nad there was no indication of it ) so then I installed the DC Phoenix tool and payed 15 euros to be able to inject the complete UPDATE.APP to my bricked phone and the installation went well to 99% and failed, but I rebooted the phone and I could boot normally. Just to make sure I did a factory reset afterwards. Hope this helps.

bahador_b_92 said:
I managed to access the fastboot using the 3 button method in cold boot. Hold the Power key until the screen goes off and then release and hold down the Vol- key and immideately connect the usb cable to PC right before it vibrates or exactly when it vibrates (it's a matter of timing), and bingo you are in fastboot and you can flash system.img, recovery.img, cust.img, cache.img and boot.img from there, but this is not how I revived my phone. I used the 3 button method again when the phone was charged for like half an hour or so and the did the same cold boot trick and I could boot into the force upgrade environment (strangely this still didn't work whitout connecting the usb cable to PC), but it somehow didn't want to read the UPDATE.APP that I had in dload folder on my SD card and wanted to have it from my PC (I just felt it nad there was no indication of it ) so then I installed the DC Phoenix tool and payed 15 euros to be able to inject the complete UPDATE.APP to my bricked phone and the installation went well to 99% and failed, but I rebooted the phone and I could boot normally. Just to make sure I did a factory reset afterwards. Hope this helps.
Click to expand...
Click to collapse
Now your phone is OK?
Sent from my NEM-L21 using Tapatalk

Anonda said:
Now your phone is OK?
Sent from my NEM-L21 using Tapatalk
Click to expand...
Click to collapse
Yes. I am actually writing this from my Huawei P9 Lite now. This phone is really a nightmare for modifying and customization. I'm not sure if I'm going to resell it or just wait a reasonable amount of time until some reviews from the next update come out and see if I might wanna take the risk and update my phone again.

Note 8 with boot loop and no access to bootloader

Hi, big problem with my note.
Unlocked with custom rom today starts going in bootloop with warning screen about this is not the original rom. So I shut down the phone and after a bit I connect it to the power ac and the phone starts to boot loop with logo honor heavenly background. I cannot enter in bootloader pressing the right buttons.
Is it bricked? There's anything I can do? Please help me and sorry for my english.
Thanks.

Hi @rolling_bonzy
you can try to enter erecovery and let it install the latest version of stockrom.
to do this, connect your device to your computer with usb, then hold powerbutton as long as it needs to restart, then keep holding "vol+" until on the screen "your device has been blablabla not trusted" and the message shows up "your device is booting now..." - wait a while and you land in the Huawei eRecovery, where you can "Download latest version and recovery" ... do that
perhaps it is needed a second time after that for doing a factory reset in the same menu
let us know if it worked, cheers =)

pixel81k said:
Hi @rolling_bonzy
you can try to enter erecovery and let it install the latest version of stockrom.
to do this, connect your device to your computer with usb, then hold powerbutton as long as it needs to restart, then keep holding "vol+" until on the screen "your device has been blablabla not trusted" and the message shows up "your device is booting now..." - wait a while and you land in the Huawei eRecovery, where you can "Download latest version and recovery" ... do that
perhaps it is needed a second time after that for doing a factory reset in the same menu
let us know if it worked, cheers =)
Click to expand...
Click to collapse
Many thanks for your reply. Unfortunately no succes. But I notice that if I press "vol -" it stops to boot loop and the screen is black. If I release the button restart flashing.

and does it flash or only wants to?
perhaps you have a chance if you create a 'dload'-folder on your sdcard and therein copy this file (for example): http://update.hicloud.com:8180/TDS/data/files/p3/s15/G3130/g1699/v168765/f1/full/update.zip (i have it from the topmost entry from http://pro-teammt.ru/firmware-database/?firmware_model=EDI-AL10&firmware_page=0 -> click on 'filelist')
After that, connect your device with usb on the computer, restart and keep holding vol+ and vol-
keep us updated

I think I bricked my P10 Lite. Need help please

I was messing with my P10 Lite and I accidentally wiped the Vendor partition (not sure if I wiped anything else) with TWRP. After the phone rebooted it said something about a critical error during boot and went into erecovery. It gave me two options( I don't remember the second one) and I chose factory reset. It started doing it's thing but I guess something went wrong because it wasn't able to boot and it started to bootloop.
I managed to get into fastboot once. The bootloader and FRP should be unlocked but I am not sure as I think I semi accidentally used the command to relock the bootloader in the hopes of it doing the automatic low level factory reset. After that restart, the phone wanted to boot up but after the Huawei logo it went into the EMUI logo which I've shown in the pictures. Now I can't use any button combination and can't enter any menu. I also can't shut down the phone as it bootloops into the EMUI logo after I press the power button. I opened the phone and turned it off by detaching the battery cable but after holding the power down key and plugging the usb cable into the phone it still boots into the EMUI logo right after the Huawei logo.
I guess not being able to enter fastboot is the major issue and after hours of googling I am yet to find a solution.
Edit: I am a newb!
Please help!

Why did you delete the vendor partition, you could try plugging the phone into your computer and checking if you can do anything with fastboot while it's showing emui logo?

Alaunus said:
I was messing with my P10 Lite and I accidentally wiped the Vendor partition (not sure if I wiped anything else) with TWRP. After the phone rebooted it said something about a critical error during boot and went into erecovery. It gave me two options( I don't remember the second one) and I chose factory reset. It started doing it's thing but I guess something went wrong because it wasn't able to boot and it started to bootloop.
I managed to get into fastboot once. The bootloader and FRP should be unlocked but I am not sure as I think I semi accidentally used the command to relock the bootloader in the hopes of it doing the automatic low level factory reset. After that restart, the phone wanted to boot up but after the Huawei logo it went into the EMUI logo which I've shown in the pictures. Now I can't use any button combination and can't enter any menu. I also can't shut down the phone as it bootloops into the EMUI logo after I press the power button. I opened the phone and turned it off by detaching the battery cable but after holding the power down key and plugging the usb cable into the phone it still boots into the EMUI logo right after the Huawei logo.
I guess not being able to enter fastboot is the major issue and after hours of googling I am yet to find a solution.
Edit: I am a newb!
Please help!
Click to expand...
Click to collapse
Dload method. Put sd card in other phone or some card readers and put appropriate files.

nemanjsb said:
Dload method. Put sd card in other phone or some card readers and put appropriate files.
Click to expand...
Click to collapse
I've already tried that. I've placed the appropriate files into my SDcard but I can't use any button commands including volume up+down+power. When I press them my device just boots into the EMUI logo and nothing happens.
Edit: It boots into the EMUI logo even if I only press the power button. Pressing volume down + usb also boots me into the EMUI logo

DaarkZek said:
Why did you delete the vendor partition, you could try plugging the phone into your computer and checking if you can do anything with fastboot while it's showing emui logo?
Click to expand...
Click to collapse
I measured once and not trice before cutting... I was also not paying enough attention/in a hurry...

Power OFF the phone.
Press and Hold VOL Down and connect the phone to PC via USB cable. The phone should boot into Bootloader (fastboot mode). Does this method work?
or try this:
Press and Hold VOL Up and connect the phone to PC via USB cable. The phone should boot into eRecovey mode and then then select "Download latest stock rom and install".

Aalesund said:
Power OFF the phone.
Press and Hold VOL Down and connect the phone to PC via USB cable. The phone should boot into Bootloader (fastboot mode). Does this method work?
or try this:
Press and Hold VOL Up and connect the phone to PC via USB cable. The phone should boot into eRecovey mode and then then select "Download latest stock rom and install".
Click to expand...
Click to collapse
Ok, it seems like not all is lost about my phone. I managed to get into fastboot. In my situation, pressing volume down + usb cable while the battery was plugged into the phone did not work. That was before I opened up my phone's case and disconnected the battery cable.
As I mentioned before, I had opened my phone and disconnected the battery cable because that was the only way to shut it off.
What I did after I disconnected the battery cable was the following:
1 - Hold volume down and don't release it
2 - Plug in USB
3 - Plug in the battery cable into the phone's mobo.
That booted me into fastboot. Right now, the phone says my bootloader in unlocked and my FRP is locked. What would be the best way to flash the new stock OS on my phone?

Aalesund said:
Power OFF the phone.
Press and Hold VOL Down and connect the phone to PC via USB cable. The phone should boot into Bootloader (fastboot mode). Does this method work?
or try this:
Press and Hold VOL Up and connect the phone to PC via USB cable. The phone should boot into eRecovey mode and then then select "Download latest stock rom and install".
Click to expand...
Click to collapse
I have downloaded THIS and THIS for the new OS but by talking with Alexxxx1 in THIS discussion I learnt that Huawei has implemented a security patch in their latest update, which I've most likely installed, that prevents you from rolling back your OS version. That means I need to install the .386 version, which should be the last if I am not wrong, instead of the .378 correct? Though I heavily dislike patches like this I guess I can't do anything about that...

A20e stuck in download mode

Hi,
I have a new a20e (a202f) out of the box.
I followed another guide to root and install twrp which turns out was wrong. I unlocked the bootloader just fine.
I have no backup, no personal boot.img or anything.
Essentially I am stuck in download mode and restarting takes me straight back to download mode.
Recovery: Error validating footer.
SW REV. CHECK FAIL (BOOTLOADER) DEVICE"
Cheers guys

What guide did you follow? You have to download your stock fw from sites like sammobile then from there you can have the boot.img and etc. Have you tried flashing stock fw using odin?
Note: Usually you flash vbmeta for footer error when you flash twrp.

Deluriane said:
What guide did you follow? Have you tried flashing stock fw using odin?
Note: Usually you flash vbmeta for footer error when you flash twrp.
Click to expand...
Click to collapse
It was a guide on 'unofficialtwrp.com' - I can't link things here yet.
I have since tar'ed an unpatched twrp (TWRP-3.3.1.0_A20_by_Agrim720.img) + vbmeta.img + boot.img (from https://forum.xda-developers.com/galaxy-a20/help/boo-img-a205fxxu2asfb-t4008739), then I flashed through AP on Odin and now I think it boots past the download mode but instead it now has fuzzy dark red screen with nothing legible.
Oh bugger, I've been a class A plum.
Can I get out of this horrible mess?

craigywaigy said:
It was a guide on 'unofficialtwrp.com' - I can't link things here yet.
I have since tar'ed an unpatched twrp (TWRP-3.3.1.0_A20_by_Agrim720.img) + vbmeta.img + boot.img (from https://forum.xda-developers.com/galaxy-a20/help/boo-img-a205fxxu2asfb-t4008739), then I flashed through AP on Odin and now I think it boots past the download mode but instead it now has fuzzy dark red screen with nothing legible.
Oh bugger, I've been a class A plum.
Can I get out of this horrible mess?
Click to expand...
Click to collapse
Well you have to use your own boot.img from your fw, not all of use the same fw that's why, some are still on u2, u3 and u4. Maybe the boot.img you got isnt the same as your fw.
Well you can start from scratch and reflash your stock fw in odin.
https://www.sammobile.com/firmwares/

Deluriane said:
Well you have to use your own boot.img from your fw, not all of use the same fw that's why, some are still on u2, u3 and u4. Maybe the boot.img you got isnt the same as your fw.
Well you can start from scratch and reflash your stock fw in odin.
Click to expand...
Click to collapse
Yep, but now I can not get back to download mode. Any pointers?

craigywaigy said:
Yep, but now I can not get back to download mode. Any pointers?
Click to expand...
Click to collapse
Try holding volume - and power and your phone will turn off, as soon as it turns off press volume + & - and plug your usb cable that is connected to a computer.

No luck with that. It displays the message about running custom os etc and to press power to continue. So I press it and it boots to the messed up red/pink/black display.

craigywaigy said:
No luck with that. It displays the message about running custom os etc and to press power to continue. So I press it and it boots to the messed up red/pink/black display.
Click to expand...
Click to collapse
Do you mean like the one attached? If yes you havent booted to download mode.
Try booting to recovery by holding volume + and power while you turn on the phone.
There is a option there to boot to download mode.

Deluriane said:
Do you mean like the one attached? If yes you havent booted to download mode.
Try booting to recovery by holding volume + and power while you turn on the phone.
There is a option there to boot to download mode.
Click to expand...
Click to collapse
Yes that screen. I've tried your suggestion with volume + but that also ends up with messed up screen

Yes so currently I'm unable to get to recovery (not sure it even flashed properly), unable to get to download mode, or to get the device recognised in odin.
I'm unable to power off. The screen is blank and when I press power it flickers shortly with some black/white/red pink colours around the edges, but the screen quickly turns blank.
From this position I can only restart by holding volume - and power.
This boots to the samsung logo and then the 'bootloader unlocked' warning. No amount of button configs have proved successful so far, and then I end up back at the blank screen.
I'm happy to start from scratch. I have downloaded the stock firmware but I'm simply unable to proceed.
Aslo the device is not recognised in windows at any point.
Thanks guys

craigywaigy said:
Yes so currently I'm unable to get to recovery (not sure it even flashed properly), unable to get to download mode, or to get the device recognised in odin.
I'm unable to power off. The screen is blank and when I press power it flickers shortly with some black/white/red pink colours around the edges, but the screen quickly turns blank.
From this position I can only restart by holding volume - and power.
This boots to the samsung logo and then the 'bootloader unlocked' warning. No amount of button configs have proved successful so far, and then I end up back at the blank screen.
I'm happy to start from scratch. I have downloaded the stock firmware but I'm simply unable to proceed.
Aslo the device is not recognised in windows at any point.
Thanks guys
Click to expand...
Click to collapse
Are you sure you pressed and hold volume +&- and plugging cable before the samsung logo pops up? You have to do it quickly right after the device turns off. You shoudn't see the bootloader warning if you done this quickly and correctly.

craigywaigy said:
Yes so currently I'm unable to get to recovery (not sure it even flashed properly), unable to get to download mode, or to get the device recognised in odin.
I'm unable to power off. The screen is blank and when I press power it flickers shortly with some black/white/red pink colours around the edges, but the screen quickly turns blank.
From this position I can only restart by holding volume - and power.
This boots to the samsung logo and then the 'bootloader unlocked' warning. No amount of button configs have proved successful so far, and then I end up back at the blank screen.
I'm happy to start from scratch. I have downloaded the stock firmware but I'm simply unable to proceed.
Aslo the device is not recognised in windows at any point.
Thanks guys
Click to expand...
Click to collapse
Hello -
Please trust me when I tell you that it can be fixed. I had the EXACT same problem and drove me crazy for 24 hours. You can deffinetly fix your phone once you get to download mode.
I had the same issue where I could not turn the phone OFF it just looped back and I pushed buttons for hours to no avail... Then some one told me it WILL WORK, it is just the timing of
the button pushing, AND the USB cable plug in. Sure enough he was right. It took me alot of tries and I even took my phone apart and un plugged the battery so I could controll the power
ON / OFF better and time the button's easier. Here is what I did ...
unplug battery so phone was 100% OFF.
Plug in battery ( phone is still OFF )
Hold Vol - then Hold Power and Vol -
As soon as the power started IMEDITALY PLUG IN USB ( have USB READY to be plugged in FAST )
DONT let go of buttons ... screen will flash quickly and then Imediatly let go of power keep holding Vol -
IF you timed this right, IT WILL proced to download mode. If not, then start over again from power OFF ( step 01 )
It took me 3 tries to get it ( after 50+ tries before ) lol
Now I am not sure about the battery unplugging ... maybe you dont need to, but it mad it work for me as I could control the power ON part of this now.
Getting to your battery is not very hard and there is a you tube video on how to do it... if you need help just PM ME.
Good luck friend.

When this happened to me all I did was hold volume up and volume down. Kept cord connected to computer. Connected to device during the bootloop and boom within seconds I was in download mode. It catches it once screen goes off in between the bootloop.
Sent from my SM-N950U using Tapatalk

Thanks you guys. In the end the battery died and then I could power up whilst holding vol+, straight to recovery and then I could flash stock rom.
Much appreciation for your help guys, it got me out of a pinch - it is my mother-in-law's new phone!

craigywaigy said:
Hi,
I have a new a20e (a202f) out of the box.
I followed another guide to root and install twrp which turns out was wrong. I unlocked the bootloader just fine.
I have no backup, no personal boot.img or anything.
Essentially I am stuck in download mode and restarting takes me straight back to download mode.
Recovery: Error validating footer.
SW REV. CHECK FAIL (BOOTLOADER) DEVICE"
Cheers guys
Click to expand...
Click to collapse
can you help me i have the same problem idk how to fix it help