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Can't enter download mode, can't unlock bootloader

Long story short I messed up my i9020T while trying to apply the HSDPA hack (wouldn't get past Google boot logo, CWM couldn't mount partitions), and after a series of failed flashes I'm now at the point where stock 2.3.4 seems to be working fine, but I can't unlock the bootloader because it gets stuck after selecting the Yes prompt, and I can't properly enter Download mode to flash via ODIN (I don't get the yellow triangle, only part of the unlock-bootloader-prompt screen).
Do I have any options left? Any way to reflash completely using another method? Fastboot seems to work fine except for the inability to unlock the bootloader.
I'm at my wit's end, appreciate any help.

Try reinstalling the Samsung USB drivers. To get into download mode easily, hold down both volume keys and plug the phone into USB. It should go into download mode right away.
Run Odin as administrator and flash the stock images.

Thanks, but that didn't work either. Even the stock ROM and locked bootloader eventually failed, so something tells me there might have been a mechanical problem after all. Currently waiting for a Best Buy refurb replacement.

[Q] Need help with FRP Lock PLEASE read me.

.
Hi - I really am in need of help. My phone which is a T-Mobile Samsung Galaxy Note 5 (was) running latest 6.x firmware,
but custom and rooted via DarkStalker's awesome ROM. All was running fine for months. I did do one thing before my phone died,
I turned OFF developer option and forgot to turn it back ON before I i rebooted. Now the phone is bricked ( I pray it is SOFT not
hard bricked ). When I turn ON the phone it just says "FRP Lock is ON" and then shuts off.
I can enter download mode but NOT recovery. This phone is my work phone and has so much important stuff on it, I just have to fix this.
Plus my wife will shot me for paying $700 and breaking it.
Anyway ... I assume I must go back to stock some how. I can boot to download mode and connect to Odin. But I tried to flash:
1) SM-N920T_1_20160702132553_r0dr7864oe.zip
Also I tried this file ( again via Odin )
2) Noble_Kernel_Auto-Root_N920T_v0.1_Rebuid3.tar.md5
But BOTH files resulted in a FAIL on the Odin screen. ( SEE PIC BELLOW )
Now when I boot it boots to a screen that says this:
Odin Mode
Download Speed: Fast
Product name: SM-N920T
Current Binary: Custom
System Status: Custom
FRP LOCK: ON
Secure Download: Enabled
Knox Warrenty Void: 1
AP Swrev: B:2 K:0 S:0
=========
Custom Binary (Recovery) BLOCKED by FAP Lock
.
Click to expand...
Click to collapse
Sooooo basically I can NOT boot to the OS because the FRP lock is ON and I guess should be OFF, but when I try to Odin Flash I get a FAIL at the end of the flash. ( again see picture bellow )
PLEASE HELP I will try anything. .. My job and my wife are going to kill me soon.....
Cheers to all
Thanks
.

Thibor69 said:
.
Hi - I really am in need of help. My phone which is a T-Mobile Samsung Galaxy Note 5 (was) running latest 6.x firmware,
but custom and rooted via DarkStalker's awesome ROM. All was running fine for months. I did do one thing before my phone died,
I turned OFF developer option and forgot to turn it back ON before I i rebooted. Now the phone is bricked ( I pray it is SOFT not
hard bricked ). When I turn ON the phone it just says "FRP Lock is ON" and then shuts off.
I can enter download mode but NOT recovery. This phone is my work phone and has so much important stuff on it, I just have to fix this.
Plus my wife will shot me for paying $700 and breaking it.
Anyway ... I assume I must go back to stock some how. I can boot to download mode and connect to Odin. But I tried to flash:
1) SM-N920T_1_20160702132553_r0dr7864oe.zip
Also I tried this file ( again via Odin )
2) Noble_Kernel_Auto-Root_N920T_v0.1_Rebuid3.tar.md5
But BOTH files resulted in a FAIL on the Odin screen. ( SEE PIC BELLOW )
Now when I boot it boots to a screen that says this:
Sooooo basically I can NOT boot to the OS because the FRP lock is ON and I guess should be OFF, but when I try to Odin Flash I get a FAIL at the end of the flash. ( again see picture bellow )
PLEASE HELP I will try anything. .. My job and my wife are going to kill me soon.....
Cheers to all
Thanks
.
Click to expand...
Click to collapse
If you are in the latest firmware (PH2) you have to flash the same firmware (PH2)

.
Thank you sir. But ... im not sure how to tell if I am PH2 or not. Either way, could you point me to a download link for the firmware and I will try it .. please
Cheers
josezr said:
If you are in the latest firmware (PH2) you have to flash the same firmware (PH2)
Click to expand...
Click to collapse

Thibor69 said:
.
Thank you sir. But ... im not sure how to tell if I am PH2 or not. Either way, could you point me to a download link for the firmware and I will try it .. please
Cheers
Click to expand...
Click to collapse
I don't know if I can put links here, but here's
https://mega.nz/#!IJ5VlSRC!HPWdi1sjAhsDm1PoCsp_UK2jkSigsjUXsUxo2egcytE

josezr said:
I don't know if I can put links here, but here's
https://mega.nz/#!IJ5VlSRC!HPWdi1sjAhsDm1PoCsp_UK2jkSigsjUXsUxo2egcytE
Click to expand...
Click to collapse
Thank you so much my friend. I will try it and report back.
Cheers

Unfortunately I did the exact same thing as you one time. And unfortunately Odin wouldn't allow me to flash anything. But there was this tool we use to use all of the time for the s4 and it's called Samsung Kies. As in "keys". Basically as long as you can get in download mode it doesn't matter how you brick it.
You just soft bricked it but the bad thing is we can't flash unadulterated version of firmware with Odin. So if frp lock is on Odin is a no go. And when I say unadulterated I mean one that's not directly from Samsung not touched or changed in anyway.... which are hard to come by in many cases in my experience. When the recovery is changed it won't pass an Odin check usually if frp lock is on. Matter of a fact I don't think you can flash anything with fap lock on with Odin. Due to the fact that frp lock is basically saying bootloader locked.
When you turn off oem mode you unlock the checks put in place by the firmware and hardware during boot. Odin uses these checks also so when you try and flash it'll be a no go. Good news for you is this already happened to me and I figured why couldn't I just restore with heimdall. Well that's a no go to. So final solution was to try out kies that I had remembered using heavily with the s4.
1. Download Samsung Kies3. Link: http://www.samsung.com/pk/support/usefulsoftware/KIES/#none
2: Install and open kies.
3. Go to the the tools tab and select firmware upgrade and initialization.
4. It will ask for your model name. Type SM-N900T.
5. Now it will ask for the Serial Number of your device. It is located on the back of your phone toward the bottom. Type that in and hit enter.
6. Now a message pops up and says the device can be restored etc...... Hit OK.
7. Now a message says Now initializing latest version. Hit OK.
8. Now it will Prepare software for initialization.
9. A screen will come up that says "Please follow the steps below to proceed with emergency recovery.
A. Make sure that the device is turned off.
B. Switch the device to recovery mode and reconnect the cable.
- To switch to recovery mode, turn on the device by pressing the Power button while holding down the Volume control "▼" Button and the Home button, and then press Continue (the Volume control "▲") button.
10. When it detects you are in download mode it will take care of the rest.
Try not to make the same mistake again.

I just rebooted with the developer options turned off on Friday. I was on ph1 firmware. Saw joeyv (spelling?) Deodexed stock rom with an option for an Odin installation. Did the installation through Odin and was back to stock. Odin flashed the kernel and tarp combo and was back up and running with root. No information was lost. For anyone else having this problem.
Sent from my SM-G935T using Tapatalk

Thank you JohnMonsour for taking the time to write all that. I will save it for future use if needed. BUT ... thanks to Josezr I got it fixed.
I was able to boot into download mode like I stated, but I just needed the correct firm to flash. They all failed until I tried
N920TUVS4DPH2_N920TTMB4DPH2_TMB.zip ( Thank you Josezr ).
I just flashed that file and Odin completed and phone rebooted to OS. So ALL IS GOOD. My only question now is ... inside the developer
options section ( in settings ) I have turned Developer options back ON but ... all the options that can be set ON or OFF are in the OFF
position and I am not sure which should be turned on. Can anyone please give me a quick run down on how they should be set .. like this:
stay awake on
next ones set to,
on
off
off
off
on
off
ect............
=======================
Debugging
=======================
on
on
off
ect........
=======================
Networking
=======================
on
off
off
ect........
It would sure help me. Thanks again to all 3 of you guys for helping.
Cheers

This is crazy I just ran into my phone becoming locked yesterday. T mobile sent me a update and my phone of course was set to auto update and my phone would do nothing it was a FRP LOCK. All I did was download odin and used this site to walk me through it all files are provided thanks to [ROM] [STOCK] N920TUVU3DPG1 | 6.0.1 | Deodexed | KNOX Free | 7.22.2016 by jovy23. At the bottum of the page is the download and also instruction to use odin. This was a life saver. LINK/ http://forum.xda-developers.com/tmo...rom-n920tuvu1boh4-5-1-1-deodexed-ciq-t3194270. Copy and past everything you need to do to get out of a FRP Lock situation is in this tutorial. Thanks again Jovy23.

JohnMonsour said:
Unfortunately I did the exact same thing as you one time. And unfortunately Odin wouldn't allow me to flash anything. But there was this tool we use to use all of the time for the s4 and it's called Samsung Kies. As in "keys". Basically as long as you can get in download mode it doesn't matter how you brick it.
You just soft bricked it but the bad thing is we can't flash unadulterated version of firmware with Odin. So if frp lock is on Odin is a no go. And when I say unadulterated I mean one that's not directly from Samsung not touched or changed in anyway.... which are hard to come by in many cases in my experience. When the recovery is changed it won't pass an Odin check usually if frp lock is on. Matter of a fact I don't think you can flash anything with fap lock on with Odin. Due to the fact that frp lock is basically saying bootloader locked.
When you turn off oem mode you unlock the checks put in place by the firmware and hardware during boot. Odin uses these checks also so when you try and flash it'll be a no go. Good news for you is this already happened to me and I figured why couldn't I just restore with heimdall. Well that's a no go to. So final solution was to try out kies that I had remembered using heavily with the s4.
1. Download Samsung Kies3. Link: http://www.samsung.com/pk/support/usefulsoftware/KIES/#none
2: Install and open kies.
3. Go to the the tools tab and select firmware upgrade and initialization.
4. It will ask for your model name. Type SM-N900T.
5. Now it will ask for the Serial Number of your device. It is located on the back of your phone toward the bottom. Type that in and hit enter.
6. Now a message pops up and says the device can be restored etc...... Hit OK.
7. Now a message says Now initializing latest version. Hit OK.
8. Now it will Prepare software for initialization.
9. A screen will come up that says "Please follow the steps below to proceed with emergency recovery.
A. Make sure that the device is turned off.
B. Switch the device to recovery mode and reconnect the cable.
- To switch to recovery mode, turn on the device by pressing the Power button while holding down the Volume control "▼" Button and the Home button, and then press Continue (the Volume control "▲") button.
10. When it detects you are in download mode it will take care of the rest.
Try not to make the same mistake again.
Click to expand...
Click to collapse
its so much wrong with this write up its not funny...for one his model number is sm-n920t second if he is in frp lock then he cant turn his phone off, i tried this method it doesnt work period

you can't turn your phone off?
Yeah actually you can hard reset it and then enter download mode....
Hold volume down the home button and power for like 10 seconds then when the screen turns black you quickly hold volume down, home, and power......
You might not be able to turn it off but you can still enter recovery and download mode.
You might not be able to get into recovery depending on how screwed up your phone is.
And kies3 version was the only one that would work with the above method, now kies has checks in place that checks your knox status and if you've tripped knox it won't work. I can rewrite the guide and link the proper kies if it's really necessary. But this is from 2016 so I am sure that I don't need a proper rewrite.
And at this point I'm pretty sure it might not even matter what version of kies is used it probably does all checks server-side. So this method is obsolete for an almost obsolete phone.
Sorry I didn't help you.

G955FD Softbricked. OEM Unlock is Disabled.

Help Help Help :
Can I get some help? I bricked my phone because I was trying to install twrp. It flashed but I got TWRP cant install.Because. OEM locked.
It flashed. Great. But now IT STILL DOESNT BOOT. I'm stuck at NO COMMAND, it keeps restarting after 20-30 seconds of showing no command. and it's looping all over.*
i flashed stock firmware.It is flashed.Then reboot.Then install system update.Then Erasing.Then rebooting.Then NO COMMAND.Then reboot itselve recovery mode.Then i wiped factoory and cache.Then press rwboot to system.Then Samsung Galaxy S8 Plus.Then install system update.Erasing.No Command. etc. Keeps rebooting. its on NO command screen. It just restarts. Doesnt boot. I want to enable OEM Unlock. I installed combination binary. But not appear in Developer Mode.
i flash atock with Kies emergency.I flash different stock firmware from updato.com. But nothing happend.

I'm a little confused.
What state is your phone currently in, i.e. can you get into download mode, turn off... what?

JeffDC said:
I'm a little confused.
What state is your phone currently in, i.e. can you get into download mode, turn off... what?
Click to expand...
Click to collapse
KIES says that. (THR) Stock. i downloaded it and flashed with Odin. Then reboot. Then system install update. Then Erasing. Then reboot and No Command! 30 seconds keeps rebooting itself 30 seconds interval Random.
I did factory format, cache clear. then the same problem. i want to install twrp recovery with oden. It says Oem Lock. Not allowed. But i flashed Combinary file. I can get into system and i to developer mode but dosnt seem OEM UNLOCK that ll do enable it.

Ok mate, but if you press Vol- + Bixby + power for couple of seconds, can you access to download mode? If you can, I think you'll have to install the firmware all over again.

Try flashing using latest firmware from sammobile. Use Odin to flash all the files contained in firmware download. Make sure you get latest firmware for your carrier. Google how to flash using Odin. Hope this gets you in the right direction. Good luck finding what u need, do copious amounts of research before attempting any rooting of devices and if all steps aren't clear as day to you then do not attempt it unless you don't mind buying multiple expensive phones to tinker with.

Did OP find a fix to this problem?
I am experiencing a similar issue. Picked my phone up to find had randomly gone into a boot loop. Tried soft reset, cache wipe, factory reset - all successful but the phone would still reboot and be stuck on device model screen. Next I decided to flash the device with stock firmware. The flash passed in Odin, the phone then rebooted, loaded to device model screen, then a screen appeared saying "installing updates" which would make it to 25% then crash. After this the phone keeps booting, shows a screen with a dead android icon and says "no command" or "error". I have tried to flash the device using Oreo and Nougat firmware but have failed every time (although the flash did pass in Odin)
Any help would be greatly appreciated as I would rather not buy a new phone due to a random hardware fault which is out of my control.

southsideswaggar said:
Try flashing using latest firmware from sammobile. Use Odin to flash all the files contained in firmware download. Make sure you get latest firmware for your carrier. Google how to flash using Odin. Hope this gets you in the right direction. Good luck finding what u need, do copious amounts of research before attempting any rooting of devices and if all steps aren't clear as day to you then do not attempt it unless you don't mind buying multiple expensive phones to tinker with.
Click to expand...
Click to collapse
This is perfect if you have soft bricked your phone!

follow this video maybe it help you
https://forum.xda-developers.com/ga...g-aqg5-fix-t3636857/post73032395#post73032395
https://www.youtube.com/watch?v=VTi3uBkpJic&t=155s

S10e Literally stuck in bootloops after 2020 Update

So i updated my phone automatically yesterday from the latest update, after it was done, i haven't been able to access my phone in anyway, it keeps on looping samsung logo and a window that says "This phone's bootloader is unlocked´and its software integrity can't be verified" and so on, ive tried to enter either Download mode and recovery mode, but none of the methods seems to have an affect on the phone at all, please help, thanks

Hmm if u have PC download Smart Switch and do Emergency Firmware recovery. That should fix it totally.

FakerS3 said:
Hmm if u have PC download Smart Switch and do Emergency Firmware recovery. That should fix it totally.
Click to expand...
Click to collapse
- The phone does not show up on the pc either

Was your phone rooted? That could explain it.

riggerman0421 said:
Was your phone rooted? That could explain it.
Click to expand...
Click to collapse
Yes

thorius95 said:
Yes
Click to expand...
Click to collapse
Same issue here. s10e stuck in boot loop (between samsung logo and warning about the bootloader being unlocked) after yesterday's update.
So far I had no success putting the phone into recovery or download mode.
The phone was rooted, then flashed with custom ROM, then flashed again with stock firmware. I kept the bootloader unlocked because I read it was risky to re-lock the bootloader.
So, is it now hopelessly bricked?

chibuche said:
Same issue here. s10e stuck in boot loop (between samsung logo and warning about the bootloader being unlocked) after yesterday's update.
So far I had no success putting the phone into recovery or download mode.
The phone was rooted, then flashed with custom ROM, then flashed again with stock firmware. I kept the bootloader unlocked because I read it was risky to re-lock the bootloader.
So, is it now hopelessly bricked?
Click to expand...
Click to collapse
Thats a good question, far as i know, my phone is unable to get any form of connection to the pc, not able to start up in recovery or download mode either. What i know for sure, there is a way out, we just have to find the way

Never attempt to update if you have rooted and made any changes to the system, deleted or added system apps, modified kernel, changed boot logo,etc.

thorius95 said:
Thats a good question, far as i know, my phone is unable to get any form of connection to the pc, not able to start up in recovery or download mode either. What i know for sure, there is a way out, we just have to find the way
Click to expand...
Click to collapse
So, here's how I put the phone in download mode.
I left the battery to drain completely, then without pressing the power button, I pressed the volume down and Bixby button; and only then I plugged the cable. Without pressing the power button, the phone started straight into Download mode.
Now Odin sees the phone, I'm about to flash it with the stock firmware and see what happens.

thorius95 said:
Thats a good question, far as i know, my phone is unable to get any form of connection to the pc, not able to start up in recovery or download mode either. What i know for sure, there is a way out, we just have to find the way
Click to expand...
Click to collapse
Maybe this thread helps: https://forum.xda-developers.com/galaxy-s10/help/galaxy-s10-bootloop-updte-to-android-10-t4023201
It's probably Samsung's vaultkeeper that caused the bootloop.

thorius95 said:
Thats a good question, far as i know, my phone is unable to get any form of connection to the pc, not able to start up in recovery or download mode either. What i know for sure, there is a way out, we just have to find the way
Click to expand...
Click to collapse
I just wanted to give an update of how I rescued my phone and kept all the information on the phone memory intact (this was one of the challenges, as I had some photos on it).
I put it in download mode by draining the battery, then tried to flash the updated firmware. It didn't work, leading once again to boot loop and all I could do was boot to the stock Android recovery - not helpful.
So I got it to download mode again and flashed the stock firmware it originally came with (prior to the update). In Odin, I put HOME_CSC in the CSC field, to keep the phone memory from being erased. This solved it.
Hope this info can help someone having the same issue.

New Samsung Update for A51 is Bricking phones

Good evening folks. Over the Past week, for some reason, people who downloaded the new Samsung update for A51 have had their phones bricked. FOR SOME REASON, this seems to only be happening here in South Australia. I haven't seen anywhere reporting on this issue other than local news. I have had three A51 phones come into my IT store, all with the same problem.
here is a link to one article talking about it: https://7news.com.au/technology/sam...ng-priceless-photos-vital-contacts--c-9340963
Upon installing the update, their phone will restart then it will not progress past the SAMSUNG logo. I have been able to get each and every phone into recovery mode however I when I try and reboot the phones into bootloader, they simply say "entering fast boot" and then don't progress any further.
Since I have been unable to boot the phone to bootloader I don't have many solutions in front of me, I can either factory reset the phone which has been proven to work, or I can try some alternative method. Simply put, I refuse to take the simple way out and simply factory reset the phone, I don't want my customers to go through the trouble of losing their photos.
The only real option I see is using ADB to install either a new update or new firmware, however, I have had ALOT of trouble finding the necessary software. I have been able to get ADB to detect the devices with a USB connection, so I tried installing some firmware, I found for my device. I didn't trust that this was the correct software, but it couldn't hurt to see if it worked.
Using a515fxxu5gvk6, I was able to find a website where I could download Firmware https://samfw.com/firmware/SM-A515F/TEL I don't believe this to have the correct software but it was the only option I could find that didn't require money or an account.
upon extracting the zip file and typing ADB sideload <file name> it would start the process of installing the software however, it would only install for a single second and then stop working. I would be greeted with the messages: "footer is wrong", "update package took 0.3s", and "signature failed". I believe this means I have either grabbed the wrong software or I have tried installing the software wrong
I really don't know where to find the correct software, and I don't even know if I will be able to update the phone using ADB since I never was able to enable developer tools.
I have already spent quite a few hours on this, and it's starting to drive me insane. I have gone down so many rabbit holes researching different options only to come back up empty-handed. Im lost and really don't know where to turn.
any help would be literally amazing, if someone could even point me in the right direction that's all I need. even if you tell me there is nothing that can be done and I need to factory reset the phone I can at least go to sleep knowing I god damn tried.

Well, one thing you should know is that Samsung doesn't use fastboot to flash software like many other brands. It's unfortunate to say that a lot of the guides you read online are just copy-paste of guides that do use fastboot. Adb doesn't really flash software without elevated permissions afaik.
You can flash firmware using Odin for Samsung devices. There should be plenty of guides online on how to use it, your main goal right now is figuring out how to boot into download mode for Samsung.
What I would do is try to turn the phone off completely if you've been able to boot to recovery. After that, hold both the volume buttons and while you're holding them, connect your phone to a PC. This should force the phone to boot to download mode. Read the screen as it may ask you to press VOL + to proceed.
After that, you can flash the files
AP_XXXX
BL_XXXX
CP_XXXX
HOME_CSC_XXXX (Use HOME_CSC instead of CSC_ so that the phones don't lose any data)
And after that, you should be able to flash firmware

ShaDisNX255 said:
Well, one thing you should know is that Samsung doesn't use fastboot to flash software like many other brands. It's unfortunate to say that a lot of the guides you read online are just copy-paste of guides that do use fastboot. Adb doesn't really flash software without elevated permissions afaik.
You can flash firmware using Odin for Samsung devices. There should be plenty of guides online on how to use it, your main goal right now is figuring out how to boot into download mode for Samsung.
What I would do is try to turn the phone off completely if you've been able to boot to recovery. After that, hold both the volume buttons and while you're holding them, connect your phone to a PC. This should force the phone to boot to download mode. Read the screen as it may ask you to press VOL + to proceed.
After that, you can flash the files
AP_XXXX
BL_XXXX
CP_XXXX
HOME_CSC_XXXX (Use HOME_CSC instead of CSC_ so that the phones don't lose any data)
And after that, you should be able to flash firmware
Click to expand...
Click to collapse
Thank you so much for your reply. I have spent the past few hours setting up Odin and installing the firmware.
I have run into another problem, I select all the firmware I wish to install then click start. It loads for two seconds then says "PASS!". However the phone is still stuck in a boot loop
I believe this is because I haven't turned in USB debugging, since I can't get into the phone I can't turn it on even if I want to.
Is there another option?

USB debugging isn't needed when flashing through Odin. You're most likely just missing the Samsung dev drivers. Try and installing them: https://developer.samsung.com/android-usb-driver