Hello
So a few days ago, my Huawei P8 Lite started doing strange things. The phone often stopped working , but I was still able to restart it. This morning, the screen was stuck again, so I restarted the phone . However, I was not able to put it on again. The screen remains black, and the only thing that is working, is the little light (that is turning red all the time).
I have no back-ups (I know, this is stupid), but there are some very dear pictures on it. I have been reading some guides to recover the date, but I can't figure out what to do, and the applications I've tried are not working.
If I connect the phone to my laptop, it is recognized as Fastboot 2.0. Is it possible to recover data through this? The fact that my laptop still recognizes something, does it mean the phone still works?
I don't have to money to go to a shop or recovery center, so any help or advice would be appreciated.
Thanks in advance!
Michieldgz said:
Hello
So a few days ago, my Huawei P8 Lite started doing strange things. The phone often stopped working , but I was still able to restart it. This morning, the screen was stuck again, so I restarted the phone . However, I was not able to put it on again. The screen remains black, and the only thing that is working, is the little light (that is turning red all the time).
I have no back-ups (I know, this is stupid), but there are some very dear pictures on it. I have been reading some guides to recover the date, but I can't figure out what to do, and the applications I've tried are not working.
If I connect the phone to my laptop, it is recognized as Fastboot 2.0. Is it possible to recover data through this? The fact that my laptop still recognizes something, does it mean the phone still works?
I don't have to money to go to a shop or recovery center, so any help or advice would be appreciated.
Thanks in advance!
Click to expand...
Click to collapse
Boot in fastboot by press and hold volume down and conect your usb cable on pc and your phone then press power button,once you are in fastboot,flash twrp recovery,then boot to recovery,once in there,conect your usb cable,you should see your memory phone
Related
Okay folks as it says in the middle of upgrading the rom my PC resets (power outtage) and it was 51% complete now I have the dreaded rainbow screen and I can't sync with the PC any longer, have I destroyed the phone and locked it forever I have done a hard/soft reset and still the rainbow screen! Any help would be appreciated.
Can no one help me??
Hey this stuff happened to me, dont be scared. its really simple this is what i did, i just turned off the phone then put it in tbe boot load mode i.e hold the camera button down for like 3 seconds after the 3 second plug in your oc cable. it should turn on. then start the upgrade program again. It will do the upgrade all over again.
dont let the comp reboot again.
tip make sure all programs and stuff are not running. just keep the computer at minimal(activies) all should go well.
Last year(late 2010, maybe mid November), I rooted my phone and flashed recovery with no problem s at all. Some time after that I added Apps2SD and that went smoothly with no problems for about a week. I purchased an 8 GB SD Card for more storage room and after I partitioned it and switched the cards my phone started acting up so i rebooted it. After that I was stuck in a boot loop, so i tried to flash it back to stock but it wouldn't take to it no matter how I tried, whether it be through recovery or SW Update. So then I tried Odin Multi loader(cant remember which version but at the time I made sure it was the one meant for the Intercept) after I flashed it with the Stock through Odin, the phone bricked. Now it will not turn on in any way(recovery or other) the only thing it does do is vibrate when I plug it in to a computer, and it will occasionally show battery life through the touch screen and keyboard buttons by lighting them, but as soon as the it is unplugged it is a brick. I see the little bit of functionality as a little bit of to be able to fix this phone whether through ADB or another function but I desperately need help with this. Can someone please help me fix this phone?
note: I currently have a Samsung Transform as my main phone so if the Intercept can't be helped then it's not that big of a problem.
I have the same problem! Please help!
When you root a phone you put the rom, and recovery onto the sd card. changing sd cards disrupts this process. Put the old sd card in and tell me what happens.
The phone doesnt come on at all
see if you can get it into download mode with the battery out.
Pull battery
connect to computer with usb
vol down + camera + end
If you get into download mode this way flash the stock.tar using SWUpdater.
Nope, it doesnt work, thx though
Ok I've got the same problem with my intercept as well, So i just like to add (maybe its just me) that when i plug my phone to the computer the phone shows that its still functions right (without the screen on), I'm able to make calls, and receive them as well (with the touch of the answer button) but just the screen doesn't turn on, AT ALL!, so KJON i don't know if your having the same problem as me but I'm just a noob and i wouldn't know what to do. But there's some ammo if you need it.
I HAVE THE SAME PROBLEM! i dont even know where /sdcard/sdx/zip/ is!
My phone is also a samsung transform and not and intercept and whenever i press vol down+ Power, only the function buttons at the bottoms light up but not the screen
i am a noob.
help?
noooooob here...i didnt wanna start another thread since i have this same problem, so i hope someone reads this..
couple days ago i bricked my sprint intercept i was using SWu and forgot to take the Binary files for the Moment out so now i cant get my phone to DL mode, ive been searching since saturday night and have tried every Button combo posted and nothing, my phone will not turn on and ofcourse it isnt recognized by my pc BUT, ive noticed that only when its plugged in to the computer after trying to power it up several times it´ll vibrate then the 4 touch buttons will react to either the call or end button, also it makes the low battery sound and if i press the camera button it makes the volume sound but i CANT get to download mode, can i bring my phone back or is it done with? help please! and thanks in advance...
well, i would say boot into rrecovery by making the phone off either power button, or remove and replace battery.
next, you will need to press and hold in order: power/end call, call, and volume down.. this should boot recovery mode.
lastly, use the red scroll device to go to reset facory defaults or factory recovery, use common sense while looking. select with clicking and use arrow back button to go back to recovery main, then reboot to system. easy as pie.
Have you tried ODIN or ADB?
I have flashed the Intercept numerous times, soft bricked more than once, I was always able to recover using either the stock bootloader, CWM recovery, or flashing the ROM/Kernel directly using ODIN or ADB.
If you are still having these issues drop me a line and I'll gather some links together that should get you back up and running.
If the phone will not boot at all, even with a charged battery, I would definately try contacting Virgin Mobile and escalating the issue. I've had plenty of luck replacing devices claiming that the device just dropped dead without notice. They are usually good about sending out a replacement phone, and on rare occasions even giving you an upgraded unit if they are out of stock.
Good luck!
Did you use Odin or the swupdater?
Bug difference. Sounds like there's a missing boot loader.
Sent from my SPH-L710 using xda app-developers app
Hi, did you guys fix your bricked phones? Today I have bricked my Samsung transform (bad flash went with SW upgrade.
Only vibrates sometimes and the buttons flash a little, but no boot at all. Is there any chance to fix it? even with Jtag?
regards
Hi guys,
I had Pure nexus rom installed:
http://forum.xda-developers.com/nexus-4/development/rom-pure-nexus-project-layers-t3237366
and everything worked fine for weeks. Yesterday I noticed that my nexus 4 is using battery too much, without any reason.. Then my phone turned off, try to restart but it was stuck on google logo. At that point there was 20 or 30% battery left. I boot it to recovery, wipe everything and tried to restore factory settings, cos I didnt have any backup on phone. But again it was stuck on google logo.
So now I cant boot it cos there's no system installed on it, basicaly there is nothing on my phone. I tried Nexus Root Toolkit, but my pc dont recognize my phone, when I boot to recovery it's still the same, so I cant install drivers..
At this point, I have no idea what to do.. Can anyone help pls?
Thx
Can you get into fastboot? Are you using Win7? Tried different USB ports and cables?
audit13 said:
Can you get into fastboot? Are you using Win7? Tried different USB ports and cables?
Click to expand...
Click to collapse
Thx for quick reply !
Yes, I'm using win7 64x, I tried all usb ports and 3 different cables and nothing. I can get into fastboot and recovery, but pc still don't recognize anything..
i am currently under the same situation
only difference is i can still fastboot and flash a recovery (twrp for that matter)
afterwards, when booting to recovery - i can install a rom
once the rom is installed, reboot does not boot into the ROM and instead just displays the google logo - then vibrates a little - then the screen turns off
I just tried on 2 other win7 pc's, still nothing.. Nexus root toolkit just can't establish adb/fastboot connection..
edit: other thing I tried is to copy ROM file on usb stick, and then connect usb stick with micro usb cable to phone, and when I'm in recovery (twrp 3.0.2-0) there is just ''internal storage'' option.. Is that normal, should twrp see external USB drive? Cos I'm thinking that maybe something is wrong with usb charging port (I replaced that board month ago).
Hi,
I have a similar problem:
I had my mobile in working condition and once when upgrading the OS to 5.0.1, it downloaded the OS and was upgrading. During that process, the charge got over and hence the phone was shutdown. There after, it was not proceeding further from Google screen when trying to reboot. So, i thought battery is dead and replaced the battery with a new one. Now, i am getting the following problem:
The phone doesn't turn on(not even getting GOOGLE screen now). But, If I keep holding power button and Volume down button and try to insert the charging cable immediately then i get the boot menu but it wont stay there for even a second and goes to GOOGLE logo screen and gets shut down. Please help me with this.
Hi guys,
I menaged to fix the problem, my problem was charging port (smal L shaped board) that I replaced month ago. That's why there was no connection.
I got another one this morning from ebay, and Nexus Root Toolkit established connection immediately.
guruhg said:
Hi,
I have a similar problem:
I had my mobile in working condition and once when upgrading the OS to 5.0.1, it downloaded the OS and was upgrading. During that process, the charge got over and hence the phone was shutdown. There after, it was not proceeding further from Google screen when trying to reboot. So, i thought battery is dead and replaced the battery with a new one. Now, i am getting the following problem:
The phone doesn't turn on(not even getting GOOGLE screen now). But, If I keep holding power button and Volume down button and try to insert the charging cable immediately then i get the boot menu but it wont stay there for even a second and goes to GOOGLE logo screen and gets shut down. Please help me with this.
Click to expand...
Click to collapse
That looks like a stuck power button.
Try just holding the volume down button and plugging the charger.
If you see the fastboot screen, you have a stuck power button.
Just experienced this issue on a Nexus 5 and I was able to recover from it by "massaging" the power button for a while.
Hey guys i really need your help, i decided to unlock the bootloader of my phone, and so i did without any issue, the phone opened and worked completly, so i wanted to relock it and so i did also without any issue, but i wanted root again so i tried to unlock it again with the same Code with the official unlocking way, but this time the phone have been stuck and red led notification blinking everytime i put in on computer.
If i plug off the power source and try to open the device the red light blink very fast and there is a charging symbol on the screen but then dissapers instantly and nothing the phone turning off.
I cannot enter on recovery or dload, anyone knows what to do? The PC cant recognize the phone if i plug it.
Here some video to check the issue, please turn on the subtitles because im speaking Greek https://www.youtube.com/watch?v=oTkx0ifNhg4
Also here https://www.youtube.com/watch?v=F9dS76eRe0c
Huawei is one of the worst companies i ever saw! Their phones are so easy to brick and they can't be fixed!
Wait until the battery drained and phone shutdown, connect charger again and wait for 5 minutes , it will turn on in erecovery , shutdown and redo fastboot etc carefully.
Dr4In said:
Hey guys i really need your help, i decided to unlock the bootloader of my phone, and so i did without any issue, the phone opened and worked completly, so i wanted to relock it and so i did also without any issue, but i wanted root again so i tried to unlock it again with the same Code with the official unlocking way, but this time the phone have been stuck and red led notification blinking everytime i put in on computer.
If i plug off the power source and try to open the device the red light blink very fast and there is a charging symbol on the screen but then dissapers instantly and nothing the phone turning off.
I cannot enter on recovery or dload, anyone knows what to do? The PC cant recognize the phone if i plug it.
Huawei is one of the worst companies i ever saw! Their phones are so easy to brick and they can't be fixed!
Click to expand...
Click to collapse
Dissconnect the usb cable and hold the power button. When it is just about to reboot, plug in the USB and hold the volume down button. This should take you to fastboot OR to error mode...
-------
Huawei devices aren't easy to brick, but recovering the devices is a pain... I hard bricked my device as well a couple weeks ago..
I have tried to wait for the battery drained completly and if you plug the usb while the phone is off the phone is powering on automatically and stays to the "Your Device has been unlocked"
Also with the same method before i plug in the usb i was trying to hold the volume down button and plug it in but it didnt happend it is booting on the same thing.
Dr4In said:
I have tried to wait for the battery drained completly and if you plug the usb while the phone is off the phone is powering on automatically and stays to the "Your Device has been unlocked"
Also with the same method before i plug in the usb i was trying to hold the volume down button and plug it in but it didnt happend it is booting on the same thing.
Click to expand...
Click to collapse
pls clear actual screen position of ur fone, unlock screen titled as fastboot and rescue or yellow text with black background.
chances are there u get fastboot connection by turning off mobile by power button hold for 7 seconds and phone turned off wait for a while ensure no USB cable connected to phone. then press volume down button and conect USB cable, you will see fast boot and rescue screen. now issue command fastboot devices. if u see ur devices serial number there then follow further fasboot procedure mentioned in other threads,
Fastboot flash boot boot.img
fastboot flash recovery recovery.img
fastboot flash system.img
above files may be obtained by extracting update.app for ur phone stock image by huawei extractor. you have to work for 2 days constantly for unbricking phone. I have gone through all these processes last week.
rizwansadiq said:
pls clear actual screen position of ur fone, unlock screen titled as fastboot and rescue or yellow text with black background.
chances are there u get fastboot connection by turning off mobile by power button hold for 7 seconds and phone turned off wait for a while ensure no USB cable connected to phone. then press volume down button and conect USB cable, you will see fast boot and rescue screen. now issue command fastboot devices. if u see ur devices serial number there then follow further fasboot procedure mentioned in other threads,
Fastboot flash boot boot.img
fastboot flash recovery recovery.img
fastboot flash system.img
above files may be obtained by extracting update.app for ur phone stock image by huawei extractor. you have to work for 2 days constantly for unbricking phone. I have gone through all these processes last week.
Click to expand...
Click to collapse
Hi, I have a similar problem: "your device has been unlocked and can't be trusted". I cannot enter fastboot nor with the two buttons method (power + volume down) or the three buttons method. I messed up with the EMUI, I guess. Infact, I unlocked the bootloader, relocked it and tried to unlock it again to flash a custom ROM. The first time I unlocked the bootloader, I tried to install TWRP but something went bad, I do not remember what, but I decided to relock.
Now I am stuck with this message. But....sometimes, I can't understand WHEN, I can enter my phone Last time it was when I tried the above solution (only volume down and usb cable, without the Power button). When the phone turned on, HiSuite recognized "a phone" was connected because the software turned on, but it couldn't really see it. I went into the Developer Options on the phone to turn on OEM, but it was grey and I could do nothing :crying:
Full of hope because the phone turned on, I then tried to flash the content of the SD Card (where I put files extracted with the Huawei Update Extractor) by holding the three buttons (power + volume up + volume down), but again it appeared the "your device has been unlocked" message.
Now the phone is off. Once, in the meantime, it appeared a red flash on the screen for one second, I am not sure it is related to the battery, it doesn't display a battery but only a flash.
I cannot enter fastboot in any way, I cannot flash from SD card, sure I cannot rollback because it implies flashing.
My only hope is some command to be given when I can enter the phone. Anyway, I sent it to repair (not official, I have obviously no guarantee anymore) and they sent it back to me: they didn't know what to do.
Any idea? Thanks a lot!
PS: I will read your replies as soon as I can but I have very variable ad unstable working hours!
Please don't blame Huawei for YOUR mistakes. Thank you
Johnny TDN said:
Please don't blame Huawei for YOUR mistakes. Thank you
Click to expand...
Click to collapse
Did I? Sorry if it seemed so, but of course are my mistakes...
help us
i have a same problem did you find solution
Same Problem Here
I have the same issue. Have anyone found a solution yet?
Dr4In said:
Hey guys i really need your help, i decided to unlock the bootloader of my phone, and so i did without any issue, the phone opened and worked completly, so i wanted to relock it and so i did also without any issue, but i wanted root again so i tried to unlock it again with the same Code with the official unlocking way, but this time the phone have been stuck and red led notification blinking everytime i put in on computer.
If i plug off the power source and try to open the device the red light blink very fast and there is a charging symbol on the screen but then dissapers instantly and nothing the phone turning off.
I cannot enter on recovery or dload, anyone knows what to do? The PC cant recognize the phone if i plug it.
Here some video to check the issue, please turn on the subtitles because im speaking Greek https://www.youtube.com/watch?v=oTkx0ifNhg4
Also here https://www.youtube.com/watch?v=F9dS76eRe0c
Huawei is one of the worst companies i ever saw! Their phones are so easy to brick and they can't be fixed!
Click to expand...
Click to collapse
I think the red light blinks cause you are critically low on power. Leave it plugged in. Ignore whats on the screen just leave it plugged in for a few hours and leave it alone.
Meticulus said:
I think the red light blinks cause you are critically low on power. Leave it plugged in. Ignore whats on the screen just leave it plugged in for a few hours and leave it alone.
Click to expand...
Click to collapse
Same here with a BLN-L21 (Honor 6x)
The phone will not charge with this method. Try to let it plug one night, and no charge !
@Meticulus this was the question felix ask you: is uboot (booting with sdcard) is possible ?
Fixed for me with buy an honor 9 ... but investigate to revive my honor 6x.
For now i have maybe found how to shutdown phone, to charge battery (with shurtcut two point in motherboard) but don't know if phone charge for the moment because there is no light
Solution for the moment but difficult AND / OR expensive ....
1. Remove emmc and repair it with a JTAG box.
2. Try to boot with uboot (but probably won't work)
---------- Post added at 03:32 PM ---------- Previous post was at 02:57 PM ----------
Dr4In said:
Hey guys i really need your help, i decided to unlock the bootloader of my phone, and so i did without any issue, the phone opened and worked completly, so i wanted to relock it and so i did also without any issue, but i wanted root again so i tried to unlock it again with the same Code with the official unlocking way, but this time the phone have been stuck and red led notification blinking everytime i put in on computer.
If i plug off the power source and try to open the device the red light blink very fast and there is a charging symbol on the screen but then dissapers instantly and nothing the phone turning off.
I cannot enter on recovery or dload, anyone knows what to do? The PC cant recognize the phone if i plug it.
Here some video to check the issue, please turn on the subtitles because im speaking Greek https://www.youtube.com/watch?v=oTkx0ifNhg4
Also here https://www.youtube.com/watch?v=F9dS76eRe0c
Huawei is one of the worst companies i ever saw! Their phones are so easy to brick and they can't be fixed!
Click to expand...
Click to collapse
Hello, can ask you some question about how you have hardbricked this phone ?
My honor 6x is same bricked, and red light too. So the big question is THE FIRSTIME BRICK = phone was FREEZE can't reboot and can't do nothing. I have wait for empty battery, and now dload and all is not working ?
I will try to charge my battery out of phone. For me it's like the phone never charge ... but i will try with a charged battery and plug unplug battery connector. It's like red screen low battery change boot mode ...
sanjay.rup said:
Same here with a BLN-L21 (Honor 6x)
The phone will not charge with this method. Try to let it plug one night, and no charge !
@Meticulus this was the question felix ask you: is uboot (booting with sdcard) is possible ?
Fixed for me with buy an honor 9 ... but investigate to revive my honor 6x.
For now i have maybe found how to shutdown phone, to charge battery (with shurtcut two point in motherboard) but don't know if phone charge for the moment because there is no light
Solution for the moment but difficult AND / OR expensive ....
1. Remove emmc and repair it with a JTAG box.
2. Try to boot with uboot (but probably won't work)
---------- Post added at 03:32 PM ---------- Previous post was at 02:57 PM ----------
Hello, can ask you some question about how you have hardbricked this phone ?
My honor 6x is same bricked, and red light too. So the big question is THE FIRSTIME BRICK = phone was FREEZE can't reboot and can't do nothing. I have wait for empty battery, and now dload and all is not working ?
I will try to charge my battery out of phone. For me it's like the phone never charge ... but i will try with a charged battery and plug unplug battery connector. It's like red screen low battery change boot mode ...
Click to expand...
Click to collapse
Its not actually mine and it was long time ago, but the owner told me that he unlocked bootloader with the official way, relocked, and then he unlocked again the third time the phone died.
Hello.
me too, he does not want to do anything anymore.
he only knows this '' your device is booting now '' screen with the red LED flashing.
whatever I do, it always starts on this screen. I think you have to change the motherboard.
Do you know where to find it at a reasonable price?
VNS-l31
Your device has been unlocked and can't be trusted
after i try to unlock my huawei P9 lite, my phone show this message "Your device has been unlocked and can't be trusted" and i can't restart or load from sd card.
i put update.app in new folder "dload", put the sd card in phone.... no boot. my laptop not detect usb phone. help me please.
ionut69 said:
after i try to unlock my huawei P9 lite, my phone show this message "Your device has been unlocked and can't be trusted" and i can't restart or load from sd card.
i put update.app in new folder "dload", put the sd card in phone.... no boot. my laptop not detect usb phone. help me please.
Click to expand...
Click to collapse
I fixed mine today. I just had to wait for 5 hours for the battery to drain. then when it shuts off i waited 10 min. after that i started the phone and i let me choose to continue to the phone.
I dunno if you have the exact same problem but thats how i fixed mine.
And after that i tried factory resetting (cause bluetooth and NFC didn't work) but then it got stuck again. so i waited it out and it worked once again.
Too scared to do anything to my phone now :/
alesbabnik said:
I fixed mine today. I just had to wait for 5 hours for the battery to drain. then when it shuts off i waited 10 min. after that i started the phone and i let me choose to continue to the phone.
I dunno if you have the exact same problem but thats how i fixed mine.
And after that i tried factory resetting (cause bluetooth and NFC didn't work) but then it got stuck again. so i waited it out and it worked once again.
Too scared to do anything to my phone now :/
Click to expand...
Click to collapse
now my battery is empty but when i plug in acc cable show same screen
any fix on this as I have the same issue with huawei p9 lite - no recovery mode, no usb reckognition from pc. Just stuck on that "unsafe" prompt screen after huawei logo
Stop buying huawei phones if you are into custom roms or root. They made the phone easily brickable and they removed the bootloader unlock site due to some stores installing malware into phones. But hey, they couldn't simply do what Xiaomi is doing eh?
Ok so before I started writing this I had only one problem now I'm worried my problem has gone from bad to worse.
I updated my 6T to 10.3.2 from the latest Beta after the process it prompted for a restart, upon restarting it got stuck in the boot animation. I tried going into Recovery and Download mode unsuccessfully so I went through the forums a bit and saw that someone who had the same problem successfully entered Recovery mode by pressing VOLUME UP+DOWN+POWER buttons simultaneously, I tried to do the same and my phone turned off and now it doesn't turn on! :crying:
Has anyone experienced this or know how to fix this? Any help will be much appreciated. Tia!
theDUD3 said:
Recovery mode by pressing VOLUME UP+DOWN+POWER buttons simultaneously, I tried to do the same and my phone turned off and now it doesn't turn on!
Click to expand...
Click to collapse
These should be clarified:
Volume Up + Power while turning on will boot to fastboot.
Volume Down + Power while turn on will boot to recovery.
Holding Volume Up + Power should force the phone to turn off.
Volume Up + Volume Down should put your phone in Download mode for the MSM Tool.
Turn the phone off, let it sit. Then try turn it back on. Any response?
try to shutdown phone ...hold vol+ and power button for like 15 sec and restart your phone if this didnt work then u can try MSM tool
Thanks guys, got it working using MSM Tool!
regarding oneplus 6 got stuck on logo screen and recovery mode not working
was just going through some random stuff on my phone and suddenly my device automatically restarted and not it is stuck on logo screen. i and when i tried to open recovery mode, nope its is just not working either. i even tried the fastboot menu to open recovery settings but still no progress help me here...its urgent going though lockdown in country so no service either cant communicate with the fam also. HELP...!!!!
frankynehemimah said:
was just going through some random stuff on my phone and suddenly my device automatically restarted and not it is stuck on logo screen. i and when i tried to open recovery mode, nope its is just not working either. i even tried the fastboot menu to open recovery settings but still no progress help me here...its urgent going though lockdown in country so no service either cant communicate with the fam also. HELP...!!!!
Click to expand...
Click to collapse
You are likely going to lose your data. Know that going in if its not already backed up.
If you have the fastboot menu you can use the fastboot roms.
Or my least favorite option or what I would try last, MSM Tool (Tmobile 6Ts use a different tool).
IMPORTANT if you want to try and recover and data off your phone first, go to fastboot, and try and "boot" the TWRP img (not the installed one, one from your PC using the fastboot command). If that works you might be able to recover data. If that does worm, try dirty flashing the last ROM you were running and see if it boots.
No worries!
frankynehemimah said:
was just going through some random stuff on my phone and suddenly my device automatically restarted and not it is stuck on logo screen. i and when i tried to open recovery mode, nope its is just not working either. i even tried the fastboot menu to open recovery settings but still no progress help me here...its urgent going though lockdown in country so no service either cant communicate with the fam also. HELP...!!!!
Click to expand...
Click to collapse
Hello, I am sorry to hear of you having this issue, I just went through 3 1/2 days (off and on) of recovering my T-Mobile OnePlus 6t which I found a way to get my unlock code within 2 weeks of having it, so I rooted it and put a custom kernel on it, stuck on 9.0 never let me update as I was not familiar with A/B partitioning, yet! The answers I saw to your questions were spot on, I just had a little to add to it and I'm sure I am not alone. Real quick let me list what has gone wrong on the rare occasion it hit the fan with the 6t...
- When I would accidentally and rarely let my battery die it seemed like it took forever to get it to reboot, I mean it sat on my desk of DOA devices for 2 weeks!
- It often seems like the buttons do not always respond properly and never have when I needed them to. Been through this before, I've bricked and unbricked and flashed and re-flashed and wiped all weekend and I like Android 10 and all but seems everything is different for every build, and everything seems to have to go in the right order with the exact right file or you wind up in a jam, period..
- That said, the previous person that answered your question has likely encountered similar, I've heard of right down to the buttons not physically working, but I have been a Smart Device Master III Technician for over 5 years, i know my buttons were not broken.
- Most likely culprit that I just handled and worked, i did have to use the MSM tool, several times - and re-unlock the BL, several times I would not even get the chance to get to fastboot, just a screen saying Build and Hardware not a match"" in yellow letters and it just bootlooped. No fastboot is no good, but when you said the tool would show some signs of working but then not, I have 2 solutions that I needed on diffrent occcasions.
1 - As mentioned fully try other USB cables, and ports, if you pull the usb-c out of the port and hold <power + vol up + vol down> eventually it will do something, very picky, sometimes gotta move your fingers to different spots on the buttons and also after 15-20sec let go of power and hit and hold it again... after a few seconds before it vibrates stick the cable in connected to your PC and the screen will be black (obv) but the msm tool will pick up on it. I know about the cables because I take good care of my phones and cables and charging ports, however on my final fix today it showed in msm tool it was connected but waiting for device.... Fed up i put the phone down and moved the usb cable a little bit and it picked up on it and did its thing! That part was just the cable, getting into qualcomm mode or w.e. is a bit tricky sometimes.
- Also someone said set it down for a while and come back to it.. THAT WORKS!! Let it fully charge and often just plugging in charger turns it on, bootloop soft brick or however have you, very simiilar to an Apple device and their DFU (don't f up mode cause screen is black..)
I hope that helps you get in touch with your family and friends.. Whatever you do, don't give up bc if you have not got it yet, you will! One other note, there are a few different msm tools available and they look the same some same size, but the one that supposed to work on my phone didn't and one that they say only a fool would attempt to try actually saved me, so if all else fails, use a different msm tool/usb cable and you will get it! I don't think I can post links yet I am on here very rarely, but plan on more! I have received so much help from XDA throughout the years on thousands of phones with just software issues alone, aas well as guides to my own phones. I would be honored to give back as I also have some extensive knowledge on many devices but I am a noob in comparison to many! Stay safe, good luck and please update and let us/ me know how it worked out for you. If i can help further I will, I have every firmware file for the OP6t, recovery, tools, software, this is not new to me but I feel your frustration!