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Can't unlock bootloader

I have a OPO Chinese 16GB version. When I bought it, it was running CM11S(Seller flashed it). Now I'm trying to wipe my phone and install cm-11.0-XNPH38R-bacon-signed-fastboot.zip on it. I have installed ADB Drivers on my Windows computer and when I type adb devices it shows me the serial number of the phone. And also when I type in fastboot devices, it shows me the serial number. But I can't get it to unlock the boot loader. When I type in the command, fastboot oem unlock, I can see the following message.
...
OKAY [ 0.002s]
finished. total time: 0.004s
But it does nothing after that. Even when I reboot, I can see all my previous apps, files etc. are there. It doesn't make any change. How can I get this phone to unlock the bootloader and allow me to install a custom recovery and let me flash the above file I have mentioned?

aroshlakshan said:
I have a OPO Chinese 16GB version. When I bought it, it was running CM11S(Seller flashed it). Now I'm trying to wipe my phone and install cm-11.0-XNPH38R-bacon-signed-fastboot.zip on it. I have installed ADB Drivers on my Windows computer and when I type adb devices it shows me the serial number of the phone. And also when I type in fastboot devices, it shows me the serial number. But I can't get it to unlock the boot loader. When I type in the command, fastboot oem unlock, I can see the following message.
...
OKAY [ 0.002s]
finished. total time: 0.004s
But it does nothing after that. Even when I reboot, I can see all my previous apps, files etc. are there. It doesn't make any change. How can I get this phone to unlock the bootloader and allow me to install a custom recovery and let me flash the above file I have mentioned?
Click to expand...
Click to collapse
There are How-to's on this site. It's probably unlocked now. Try flashing a custum recovery in fastboot.

aroshlakshan said:
I have a OPO Chinese 16GB version. When I bought it, it was running CM11S(Seller flashed it). Now I'm trying to wipe my phone and install cm-11.0-XNPH38R-bacon-signed-fastboot.zip on it. I have installed ADB Drivers on my Windows computer and when I type adb devices it shows me the serial number of the phone. And also when I type in fastboot devices, it shows me the serial number. But I can't get it to unlock the boot loader. When I type in the command, fastboot oem unlock, I can see the following message.
...
OKAY [ 0.002s]
finished. total time: 0.004s
But it does nothing after that. Even when I reboot, I can see all my previous apps, files etc. are there. It doesn't make any change. How can I get this phone to unlock the bootloader and allow me to install a custom recovery and let me flash the above file I have mentioned?
Click to expand...
Click to collapse
That means that the device was already unlocked. Where did you buy yours? Ali Express? Mine's from there and I have gone through what you're going through right now. No worries. Bootloader is already unlocked so you can root it already.

ken_alpha24 said:
That means that the device was already unlocked. Where did you buy yours? Ali Express? Mine's from there and I have gone through what you're going through right now. No worries. Bootloader is already unlocked so you can root it already.
Click to expand...
Click to collapse
I bought that off of eBay. I have tried to flash a custom recovery but it doesn't seem to get installed as well. After I do it, I only see the stock recovery but when I run the command fastboot flash recovery recovery.img it gives me the following message.
target reported max download size of 536870912 bytes
sending 'recovery' (8134 KB)...
OKAY [ 0.264s]
writing 'recovery'...
OKAY [ 0.179s]
finished. total time: 0.445s
But when I go to recovery, I only see the stock recovery. It seems like even-though the command are executed successfully on the computer, they are not applied to the phone. Any ideas?

Any ideas guys?

aroshlakshan said:
Any ideas guys?
Click to expand...
Click to collapse
Settings > Developer Options > Update CM Recovery (untick)
Then flash your recovery via fastboot and it'll stick.

zephiK said:
Settings > Developer Options > Update CM Recovery (untick)
Then flash your recovery via fastboot and it'll stick.
Click to expand...
Click to collapse
I was able to flash a custom recovery. Thank you. I'm now about to CLEAN INSTALL XNPH38R on my phone. Any ideas on how to do that?

aroshlakshan said:
I was able to flash a custom recovery. Thank you. I'm now about to CLEAN INSTALL XNPH38R on my phone. Any ideas on how to do that?
Click to expand...
Click to collapse
Download the factory stock images on cyngn. Find it online and fastboot flash it. There's a good guide online in the general forums that shows you how to go back to stock
Sent from my One A0001 using Tapatalk

zephiK said:
Download the factory stock images on cyngn. Find it online and fastboot flash it. There's a good guide online in the general forums that shows you how to go back to stock
Sent from my One A0001 using Tapatalk
Click to expand...
Click to collapse
I got it working. I flashed TWRP on my phone and wiped the phone. Downloaded http://builds.cyngn.com/factory/bacon/cm-11.0-XNPH38R-bacon-signed-fastboot.zip , extracted the contents and flashed it with fastboot using the following commands.
fastboot flash modem NON-HLOS.bin
fastboot flash sbl1 sbl1.mbn
fastboot flash dbi sdi.mbn
fastboot flash aboot emmc_appsboot.mbn
fastboot flash rpm rpm.mbn
fastboot flash tz tz.mbn
fastboot flash LOGO logo.bin
fastboot flash boot boot.img
fastboot flash cache cache.img
fastboot flash system system.img
fastboot flash userdata userdata_64g.img
fastboot reboot
Hope this helps a newcomer like me. Thanks guys.

Moto G4 play harpia stock firmware.

I figured that since the Motorola web site doesn't have the firmware for this yet I would post a link to my Dropbox so others have access to the firmware. This is for us cellular Moto g4 play xt1607 not sure if it will work for devices on a different carrier. If someone could make a backup of their current rom and test it out to let us all know if it does that would be great. Please hit the thanks button if this helps anyone. https://www.dropbox.com/s/i6jsafelq...y-DEFAULT_regulatory-DEFAULT_CFC.xml.zip?dl=0
This must be flashed with fastboot. If you do not know how to flash with fastboot there are tons of how to videos if you google it.
BACKUP YOUR DEVICE TO SD CARD OR PC BEFORE DOING ANYTHING!!!!!
DISCLAIMER: FLASHING ANYTHING TO YOUR PHONE HAS RISKS. IF YOU DO NOT KNOW WHAT YOU ARE DOING AND YOU HAVE JUST PURCHASED YOUR PHONE AND HAVE NOT UNLOCKED THE BOOTLOADER STOP!!!!! DO NOT CONTINUE. IM NOT SURE WHAT THE EFFECTS WILL BE IF YOU TRY FLASHING WITH A LOCKED BOOTLOADER, IT COULD BRICK YOUR DEVICE!!!!! I AM NOT RESPONSIBLE FOR ANY DAMAGE CAUSED BY FLASHING THIS FIRMWARE. IF YOU DID SOMETHING WRONG AND DONT FOLLOW INSTRUCTIONS THAN THATS YOUR OWN T.S.

Just in case you can't use google, for some crazy reason, put phone into bootloader mode then on PC download and install minimal fastboot and adb then download firmware, unzip firmware to desktop then open that file and click on a blank spot then hold shift and right click on that blank spot then click open command window here. In that command window type
fastboot oem fb_mode_set
fastboot flash partition gpt.bin
fastboot flash bootloader bootloader.img
fastboot flash logo logo.bin
fastboot flash boot boot.img
fastboot flash recovery recovery.img
fastboot flash dsp adspso.bin
fastboot flash oem oem.img
fastboot flash system system.img sparsechunk.0
fastboot flash system system.img sparsechunk.1
fastboot flash system system.img sparsechunk.2
fastboot flash system system.img sparsechunk.3
fastboot flash system system.img sparsechunk.4
fastboot flash system system.img sparsechunk.5
fastboot flash system system.img sparsechunk.6
fastboot flash system system.img sparsechunk.7
fastboot flash modem NON-HLOS.bin
fastboot erase modemst1
fastboot erase modemst2
fastboot flash fsg fsg.mbn
fastboot erase cache
fastboot erase userdata
fastboot erase customize
fastboot erase clog
fastboot oem fb_mode_clear
fastboot reboot
If you are running windows 10 you can copy all lines and paste to the command window and it will do all without having to type every line one by one, not sure if it works the same on windows 8.1, 8 or 7 but it does on 10 just remember to hit enter after it completes and you see fastboot reboot on the command window for some reason it doesn't do this for you. That's all there is to it it's very easy. After the device has rebooted you will be at 100% stock with a completely de-bloated rom! This should work on any xt1607, but please be safe and make a backup on sd card or PC before doing anything. If you are still having issues I will have my 4 year old come to your house to bring you to school. Happy flashing everyone and please hit the thanks button if this helps.

I have tried following your instructions so that i can restore my us cellular xt1607 back to stock but all i get are failed (data transfer failure (unknown error)) messages.not really sure what the issue is. I am using minimal fastboot and adb 1.4. Any help would be greatly appreciated.
DanHutchins said:
Just in case you can't use google, for some crazy reason, put phone into bootloader mode then on PC download and install minimal fastboot and adb then unzip firmware to desktop then open that file and click on a blank spot then hold shift and right click on that blank spot then click open command window here. In that command window type
fastboot oem fb_mode_set
fastboot flash partition gpt.bin
fastboot flash bootloader bootloader.img
fastboot flash logo logo.bin
fastboot flash boot boot.img
fastboot flash recovery recovery.img
fastboot flash dsp adspso.bin
fastboot flash oem oem.img
fastboot flash system system.img sparsechunk.0
fastboot flash system system.img sparsechunk.1
fastboot flash system system.img sparsechunk.2
fastboot flash system system.img sparsechunk.3
fastboot flash system system.img sparsechunk.4
fastboot flash system system.img sparsechunk.5
fastboot flash system system.img sparsechunk.6
fastboot flash system system.img sparsechunk.7
fastboot flash modem NON-HLOS.bin
fastboot erase modemst1
fastboot erase modemst2
fastboot flash fsg fsg.mbn
fastboot erase cache
fastboot erase userdata
fastboot erase customize
fastboot erase clog
fastboot oem fb_mode_clear
fastboot reboot
If you are running windows 10 you can copy all lines and paste to the command window and it will do all without having to type every line one by one, not sure if it works the same on windows 8.1, 8 or 7 but it does on 10 just remember to hit enter after it completes and you see fastboot reboot on the command window for some reason it doesn't do this for you. That's all there is to it it's very easy. After the device has rebooted you will be at 100% stock with a completely de-bloated rom! This should work on any xt1607, but please be safe and make a backup on sd card or PC before doing anything. If you are still having issues I will have my 4 year old come to your house to bring you to school. Happy flashing everyone and please hit the thanks button if this helps.
Click to expand...
Click to collapse

jestyr8 said:
I have tried following your instructions so that i can restore my us cellular xt1607 back to stock but all i get are failed (data transfer failure (unknown error)) messages.not really sure what the issue is. I am using minimal fastboot and adb 1.4. Any help would be greatly appreciated.
Click to expand...
Click to collapse
Is the bootloader unlocked?

jestyr8 said:
I have tried following your instructions so that i can restore my us cellular xt1607 back to stock but all i get are failed (data transfer failure (unknown error)) messages.not really sure what the issue is. I am using minimal fastboot and adb 1.4. Any help would be greatly appreciated.
Click to expand...
Click to collapse
What command gives the error?

I am unlocked and root with twrp and su installed and working. Unfortunately, I forgot the cardinal rule of making a backup before rooting. phone is working but having some issues. As far as which command is giving me the issues.
fb_mode_set is fine. but after that I get.
(bootloader) has-slotartition: not found
target reported max download size of 268435456 bytes
sending 'partition' (32 KB)...
FAILED (data transfer failure (Unknown error))
finished. total time: 5.008s
DanHutchins said:
Is the bootloader unlocked?
Click to expand...
Click to collapse

jestyr8 said:
I am unlocked and root with twrp and su installed and working. Unfortunately, I forgot the cardinal rule of making a backup before rooting. phone is working but having some issues. As far as which command is giving me the issues.
fb_mode_set is fine. but after that I get.
(bootloader) has-slotartition: not found
target reported max download size of 268435456 bytes
sending 'partition' (32 KB)...
FAILED (data transfer failure (Unknown error))
finished. total time: 5.008s
Click to expand...
Click to collapse
Not sure. Did you make sure USB debugging is active for file transfer?

jestyr8 said:
I am unlocked and root with twrp and su installed and working. Unfortunately, I forgot the cardinal rule of making a backup before rooting. phone is working but having some issues. As far as which command is giving me the issues.
fb_mode_set is fine. but after that I get.
(bootloader) has-slotartition: not found
target reported max download size of 268435456 bytes
sending 'partition' (32 KB)...
FAILED (data transfer failure (Unknown error))
finished. total time: 5.008s
Click to expand...
Click to collapse
Every time you unplug the phone from PC then plug it back in you must change debugging to file transfer.

II seem to be going backwards.
Heres the steps i had been following..that now no longer seem to work. with phone running....plug in, run minimal adb...check for devices with adb devices command...device is listed...then use adb reboot bootloader. from there I started using your list of commands to flash the phone. however after the first command to set fastboot mode all I get are errors. now for some reason adb isn't even seeing my phone.
DanHutchins said:
Every time you unplug the phone from PC then plug it back in you must change debugging to file transfer.
Click to expand...
Click to collapse

jestyr8 said:
II seem to be going backwards.
Heres the steps i had been following..that now no longer seem to work. with phone running....plug in, run minimal adb...check for devices with adb devices command...device is listed...then use adb reboot bootloader. from there I started using your list of commands to flash the phone. however after the first command to set fastboot mode all I get are errors. now for some reason adb isn't even seeing my phone.
Click to expand...
Click to collapse
That's because if you unplug the phone from the PC then plug it back in it defaults the USB debugging to charge only. If you get into twrp you can still put a custom ROM in root of phone to flash in twrp. I would try that then try to install the stock again. Be sure to have debugging set to file transfer.

I've been doing that...I'll give squids CM13 rom a shot as it is the only rom out there and see if that works. Thanks for your help. I really wasn't expecting such a quick response on a Saturday morning..I'll let you know how it goes
DanHutchins said:
Every time you unplug the phone from PC then plug it back in you must change debugging to file transfer.
Click to expand...
Click to collapse

jestyr8 said:
I've been doing that...I'll give squids CM13 rom a shot as it is the only rom out there and see if that works. Thanks for your help. I really wasn't expecting such a quick response on a Saturday morning..I'll let you know how it goes
Click to expand...
Click to collapse
Please do as of now that's the best I can do. Everything worked fine for me. I have flashed the same file many times on my g4 play

jestyr8 said:
I've been doing that...I'll give squids CM13 rom a shot as it is the only rom out there and see if that works. Thanks for your help. I really wasn't expecting such a quick response on a Saturday morning..I'll let you know how it goes
Click to expand...
Click to collapse
Were you able to get back to stock?

DanHutchins said:
Were you able to get back to stock?
Click to expand...
Click to collapse
Haven't gotten back to stock yet, but did get cm13 running with no issues. I'm still playing with it to try and see what's up. Since I've gotten cm13 running I'm undecided on staying with it and upgrading to cm14 when it's ported or continue trying to go back to stock and getting nougat thru that way.

jestyr8 said:
Haven't gotten back to stock yet, but did get cm13 running with no issues. I'm still playing with it to try and see what's up. Since I've gotten cm13 running I'm undecided on staying with it and upgrading to cm14 when it's ported or continue trying to go back to stock and getting nougat thru that way.
Click to expand...
Click to collapse
I like cm13 there just aren't any real good themes for free. I don't mind donating to a dev. but if I can't test it out to see if I like it or not I don't want to pay.

I'm using the material glass theme along with stealth icons, i like it a lot

jestyr8 said:
I'm using the material glass theme along with stealth icons, i like it a lot
Click to expand...
Click to collapse
Looks cool.

DanHutchins said:
Looks cool.
Click to expand...
Click to collapse
So just further update. Got as far as fastboot partition gpt.bin. after that it just gives me transfer failed errors. So I guess I am just going to stick with cm13 since that is running good. at least until someone makes a flashable zip of the stock firmware. I have never tried any dev work with android, so while I know it is possible to make a flashable zip out of these files it is way beyond my skills and knowledge. Thanks Dan for your help and fast response time.

jestyr8 said:
So just further update. Got as far as fastboot partition gpt.bin. after that it just gives me transfer failed errors. So I guess I am just going to stick with cm13 since that is running good. at least until someone makes a flashable zip of the stock firmware. I have never tried any dev work with android, so while I know it is possible to make a flashable zip out of these files it is way beyond my skills and knowledge. Thanks Dan for your help and fast response time.
Click to expand...
Click to collapse
No problem, ask around for anyone able to make it flash able with twrp I'm sure someone can or at least give you instructions on how to do it.

USB debugging to file transfer
DanHutchins said:
Every time you unplug the phone from PC then plug it back in you must change debugging to file transfer.
Click to expand...
Click to collapse
Where/how to "change debugging to file transfer" on Win-7?
Thanks!
Until now, my only experience was flashing a recovery image to Moto E2 with command:
Code:
fastboot flash recovery twrp.img
Neither I have to change "USB debugging to file transfer", nor I needed to use command
Code:
fastboot oem fb_mode_set
Is that something new and specific to Moto G Play 4th Gen?
Edit:
I have just unlocked the bootloader of my new Moto G4 Play and flashed a new logo file with command:
Code:
fastboot flash logo logo.bin
Still puzzled by "change debugging to file transfer"

[SOLVED]Oneplus 7 stuck in fastbootmode after trying to restore a backup from TWRP

My bootloader is unlocked, I was rooted with Magisk and i had twrp recovery installed as well. A few modules were installed and i had made a backup about 3 weeks ago. Yesterday i tried restoring the backup in twrp and it seemed to restore properly without errors . When i pressed reboot in the end the phone went to the fastboot mode screen and has since been there. All i can do is turn it off and regardless of what i pick, (START, Restart Bootloader, Recovery mode) it just starts into fastboot mode. Confused as to what i should do now and why this happened in the first place. All the threads i found were only for the 7 pro so i didnt want to risk anything by following those. Please advice on what i should do.
Edit : The problem was solved by flashing the STOCK ROM for android 9 which is what i was on when the device was softbricked.

hi
Hi, download adb fastboot and twrp recovery image for guacamoleb. then open a new command prompt (CMD) in the same location and run the following commands:
Code:
fastboot flash recovery (file name of twrp that you download).img
after that by holding volume up + power reboot to twrp recovery that you just installed via adb fastboot command.
when you enter on twrp recovery, install twrp recovery zip, and magisk 19.3 zip (download and copy on phone storage first, after you enter on twrp when reboot, you can connect your phone with computer or USB that contain twrp recovery zip and magisk or copy to phone storage) after this step install twrp zip first than magisk and then reboot.
i hope i helped.
sorry for my english , is not my native language.

klediY said:
Hi, download adb fastboot and twrp recovery image for guacamoleb. then open a new command prompt (CMD) in the same location and run the following commands:
Code:
fastboot flash recovery (file name of twrp that you download).img
after that by holding volume up + power reboot to twrp recovery that you just installed via adb fastboot command.
when you enter on twrp recovery, install twrp recovery zip, and magisk 19.3 zip (download and copy on phone storage first, after you enter on twrp when reboot, you can connect your phone with computer or USB that contain twrp recovery zip and magisk or copy to phone storage) after this step install twrp zip first than magisk and then reboot.
i hope i helped.
sorry for my english , is not my native language.
Click to expand...
Click to collapse
Thank you for the reply. Unfortunately i am stuck in the very first step. After typing C:\adb\Oneplus 7>fastboot flash recovery twrp-3.3.1-1-guacamoleb.img in cmd the following happens
target reported max download size of 805306368 bytes
sending 'recovery' (56612 KB)...
OKAY [ 1.220s]
writing 'recovery'...
FAILED (remote: (recovery_b) No such partition)
finished. total time: 1.228s
I have tried using fastboot boot recovery instead in cmd. The following error comes up
cannot load 'recovery': No such file or directory.
I have checked whether the device is connected by typing in fastboot devices and it shows as connected. Any other suggestions will be helpful.

wolfsbane169 said:
Thank you for the reply. Unfortunately i am stuck in the very first step. After typing C:\adb\Oneplus 7>fastboot flash recovery twrp-3.3.1-1-guacamoleb.img in cmd the following happens
target reported max download size of 805306368 bytes
sending 'recovery' (56612 KB)...
OKAY [ 1.220s]
writing 'recovery'...
FAILED (remote: (recovery_b) No such partition)
finished. total time: 1.228s
I have tried using fastboot boot recovery instead in cmd. The following error comes up
cannot load 'recovery': No such file or directory.
I have checked whether the device is connected by typing in fastboot devices and it shows as connected. Any other suggestions will be helpful.
Click to expand...
Click to collapse
Something similar happened to me, I was on OOS 10 stable and wiping the system and data from TWRP got in fastboot mode without being possible to do anything else. The way that I solved was flashing from fastboot the OOS 10 stable posted rom here: https://forum.xda-developers.com/oneplus-7/how-to/rom-stock-fastboot-roms-oneplus-7-t3937478 This will erase all your data but you will unbrick your phone.
One important thing, if you are on android 10 you can't flash TWRP via fasboot, maybe that's the problem you are having right now.
Hope this helps

ryupunk said:
Something similar happened to me, I was on OOS 10 stable and wiping the system and data from TWRP got in fastboot mode without being possible to do anything else. The way that I solved was flashing from fastboot the OOS 10 stable posted rom here: https://forum.xda-developers.com/oneplus-7/how-to/rom-stock-fastboot-roms-oneplus-7-t3937478 This will erase all your data but you will unbrick your phone.
One important thing, if you are on android 10 you can't flash TWRP via fasboot, maybe that's the problem you are having right now.
Hope this helps
Click to expand...
Click to collapse
Ok so thank you for the help and you were right. Now i have an all new different problem. In a nutshell i flashed the stock ROM for android 9 while i was in android 10. I completely forgot you aren't supposed to do that. As a result i cant even access fastboot mode now. Can you please tell me how i can fix this problem?

wolfsbane169 said:
Ok so thank you for the help and you were right. Now i have an all new different problem. In a nutshell i flashed the stock ROM for android 9 while i was in android 10. I completely forgot you aren't supposed to do that. As a result i cant even access fastboot mode now. Can you please tell me how i can fix this problem?
Click to expand...
Click to collapse
I think that you will need to use the MSM tool, it looks like you have a hard brick, the good news is that oneplus devices can be revived in almost all cases. I have never used the tool but I found some posts that might help you. Best of luck!
XDA Oneplus 7 thread
https://forum.xda-developers.com/oneplus-7/how-to/unbrick-tool-oneplus-7-msmtool-hydrogen-t3953240
XDA Oneplus 7 pro thread
https://forum.xda-developers.com/oneplus-7-pro/how-to/msm-tool-guac-t3934691
Oneplus forum guide
https://forums.oneplus.com/threads/...ide-for-a-hard-bricked-oneplus-7-pro.1041896/

ryupunk said:
I think that you will need to use the MSM tool, it looks like you have a hard brick, the good news is that oneplus devices can be revived in almost all cases. I have never used the tool but I found some posts that might help you. Best of luck!
XDA Oneplus 7 thread
https://forum.xda-developers.com/oneplus-7/how-to/unbrick-tool-oneplus-7-msmtool-hydrogen-t3953240
XDA Oneplus 7 pro thread
https://forum.xda-developers.com/oneplus-7-pro/how-to/msm-tool-guac-t3934691
Oneplus forum guide
https://forums.oneplus.com/threads/...ide-for-a-hard-bricked-oneplus-7-pro.1041896/
Click to expand...
Click to collapse
I have tried using it but the problem is that MSM download tool does not detect my phone. i have uninstalled and let windows automatically update qualcomm drivers. I have also made windows manually install them after uninstalling.

Htc bootloader unlocked but Not Allowed on Production Device

I am currently running android 9.0 on htc dual sim model. i have unlocked my bootloader but whenever i tried to flash twrp or any other fastboot command after sending it says not allowed on production device.
target reported max download size of 536870912 bytes
sending 'recovery' (46340 KB)...
OKAY [ 1.320s]
writing 'recovery'...
FAILED (remote: Not allowed on PRODUCTION device)
finished. total time: 1.355s
i have tried both commands
fastboot flash recovery
htc_fastboot flash recovery (through different folder heaving related files)
Help me Solve that issue.

hassanulhaq said:
I am currently running android 9.0 on htc dual sim model. i have unlocked my bootloader but whenever i tried to flash twrp or any other fastboot command after sending it says not allowed on production device.
target reported max download size of 536870912 bytes
sending 'recovery' (46340 KB)...
OKAY [ 1.320s]
writing 'recovery'...
FAILED (remote: Not allowed on PRODUCTION device)
finished. total time: 1.355s
i have tried both commands
fastboot flash recovery
htc_fastboot flash recovery (through different folder heaving related files)
Help me Solve that issue.
Click to expand...
Click to collapse
I recently unlocked bootloader to flash Magisk so I could have root access. I was getting the same error and found out that you must do the flashing in "download mode", not in fastboot or bootloader mode.
---------- Post added at 01:32 AM ---------- Previous post was at 01:31 AM ----------
hassanulhaq said:
I am currently running android 9.0 on htc dual sim model. i have unlocked my bootloader but whenever i tried to flash twrp or any other fastboot command after sending it says not allowed on production device.
target reported max download size of 536870912 bytes
sending 'recovery' (46340 KB)...
OKAY [ 1.320s]
writing 'recovery'...
FAILED (remote: Not allowed on PRODUCTION device)
finished. total time: 1.355s
i have tried both commands
fastboot flash recovery
htc_fastboot flash recovery (through different folder heaving related files)
Help me Solve that issue.
Click to expand...
Click to collapse
I recently unlocked bootloader on my HTC U11 to flash Magisk so I could have root access. I was getting the same error and found out that you must do the flashing in "download mode", not in fastboot or bootloader mode.

Download mode
CiroConsentino said:
I recently unlocked bootloader to flash Magisk so I could have root access. I was getting the same error and found out that you must do the flashing in "download mode", not in fastboot or bootloader mode.
---------- Post added at 01:32 AM ---------- Previous post was at 01:31 AM ----------
I recently unlocked bootloader on my HTC U11 to flash Magisk so I could have root access. I was getting the same error and found out that you must do the flashing in "download mode", not in fastboot or bootloader mode.
Click to expand...
Click to collapse
How to do that in download mode?

hassanulhaq said:
How to do that in download mode?
Click to expand...
Click to collapse
hi, sorry for the late reply, my brother "borrowed" my phone for a couple weeks and he did a factory reset. I don't have my phone yet, hopefully I won't have to unlock the phone again or flash Magisk into the bootloader again either...
To unlock the bootloader, I followed this nice and detailed tutorial here:
https://www.getdroidtips.com/unlock-bootloader-htc-u11/
Click to expand...
Click to collapse
.
Then I followed Magisk's official tutorial on how to flash it without a custom recovery... here
https://savegyd.com/magisk-root-tutorial/
Click to expand...
Click to collapse
... just go to the "How to install Magisk with ADB and Fastboot (without custom recovery)" section and read it carefully, but instead of rebooting the phone into fastboot mode, I had to do it all in download mode.
I I did not install TWRP custom recovery, I manually patched the stock "boot.img" file with Magisk and then flashed the patched boot with this command with the ADB tool in Windows (phone in download mode):
fastboot flash boot patched_boot.img. I wanted to keep HTC's stock recovery.
Then I rebooted the phone into Android, and opened "Magisk" app in Android to make sure the root was working...
I didn't have internet connection in my phone (data connection or wifi), I did it all offline.
If you don't have the locked "boot.img" you must check the exact version of your installed Android OS and download the correct RUU file. Then you can extract the boot.img from it, patch it with Magisk, then flash it into the phone.
I did it in download mode as it was failing in fastboot mode. Make sure to enter download mode when you restart your phone, not fastboot mode. I'm not responsible if you brick your phone. My phone is the "Global" version from India (6GB RAM, 128GB internal storage).

issue resolved
CiroConsentino said:
hi, sorry for the late reply, my brother "borrowed" my phone for a couple weeks and he did a factory reset. I don't have my phone yet, hopefully I won't have to unlock the phone again or flash Magisk into the bootloader again either...
To unlock the bootloader, I followed this nice and detailed tutorial here: .
Then I followed Magisk's official tutorial on how to flash it without a custom recovery... here
... just go to the "How to install Magisk with ADB and Fastboot (without custom recovery)" section and read it carefully, but instead of rebooting the phone into fastboot mode, I had to do it all in download mode.
I I did not install TWRP custom recovery, I manually patched the stock "boot.img" file with Magisk and then flashed the patched boot with this command with the ADB tool in Windows (phone in download mode):
fastboot flash boot patched_boot.img. I wanted to keep HTC's stock recovery.
Then I rebooted the phone into Android, and opened "Magisk" app in Android to make sure the root was working...
I didn't have internet connection in my phone (data connection or wifi), I did it all offline.
If you don't have the locked "boot.img" you must check the exact version of your installed Android OS and download the correct RUU file. Then you can extract the boot.img from it, patch it with Magisk, then flash it into the phone.
I did it in download mode as it was failing in fastboot mode. Make sure to enter download mode when you restart your phone, not fastboot mode. I'm not responsible if you brick your phone. My phone is the "Global" version from India (6GB RAM, 128GB internal storage).
Click to expand...
Click to collapse
Issue was resolved. My phone's bootloader was unlocked and and top of all it got pie update on unlocked bootloader with rooted phone and updated to android pie, then it started creating random issues like phone booting time was around 10 to 15 mins and i was getting above mentioned error. whenever i was booting to download mode my system was not detecting my phone but in fastboot mode it was detecting (kind of strange issue)... which turns out to be a cable issue. Once i changed my cable my phone was detected in download mode. So i re-locked the bootloader and then again flashed the firmware everything came to normal. Phone is up and working fine and thanks for help again.

[SOLVED] Unable to flash boot image - Pixel 4a

I have been using this method to flash new stock update every month to my rooted pixel 4a.
Steps I follow:
- Download the factory image of the last month
- Extract the boot.img. And patch it using magisk canary build
- Move the boot.img to the computer and flash it in fastboot mode
- flash the complete image
- Reroot the phone using magisk
This time with January update, I am getting stuck on step 3. Everytime I try to flash the bootloader image using the command:
C:\platform-tools>fastboot flash bootloader "C:\platform-tools\magisk_boot.img.img"
I get the following error:
Sending 'bootloader' (65536 KB) OKAY [ 1.609s]
Writing 'bootloader' FAILED (remote: 'No such file or directory')
fastboot: error: Command failed
No, It isn't booted in fastbootd mode. I am using correct Fastboot mode using the hotkeys
Kindly assist. Thank you

Your fastboot may be old... Upgrading it might help.
Or you might be able to use fastboot boot patched.img to get temporary root and use Magisk manager to install (direct) to make it permanent. That's what I do, and it's always worked.

Absarock said:
I have been using this method to flash new stock update every month to my rooted pixel 4a.
Steps I follow:
- Download the factory image of the last month
- Extract the boot.img. And patch it using magisk canary build
- Move the boot.img to the computer and flash it in fastboot mode
- flash the complete image
- Reroot the phone using magisk
This time with January update, I am getting stuck on step 3. Everytime I try to flash the bootloader image using the command:
C:\platform-tools>fastboot flash bootloader "C:\platform-tools\magisk_boot.img.img"
I get the following error:
Sending 'bootloader' (65536 KB) OKAY [ 1.609s]
Writing 'bootloader' FAILED (remote: 'No such file or directory')
fastboot: error: Command failed
No, It isn't booted in fastbootd mode. I am using correct Fastboot mode using the hotkeys
Kindly assist. Thank you
Click to expand...
Click to collapse
fastboot flash boot
And not
fastboot flash bootloader
Cheers!

Typhus_ said:
fastboot flash boot
And not
fastboot flash bootloader
Cheers!
Click to expand...
Click to collapse
Thank you, sir. It helped

a1291762 said:
Your fastboot may be old... Upgrading it might help.
Or you might be able to use fastboot boot patched.img to get temporary root and use Magisk manager to install (direct) to make it permanent. That's what I do, and it's always worked.
Click to expand...
Click to collapse
I tried updating fastboot. Didn't work.
Either way I was able to solve by using the command boot_b instead of bootloader. B being the partition