Can't use adb after unlock bootloader again - Samsung Galaxy S10e Questions & Answers

When I first time unlock the bootloader on my Galaxy S10e (Exynos), I can easily flash custom recovery and ROM, I've tried many custom ROM but then back to OneUI and locked the bootloader
Then the 2nd time I unlocked the bootloader but ADB isn't recognized my phone in download mode anymore, I've tried all kinds of drivers, please help me
(ADB still recognized in recovery and normal OS)
[sorry for no picture]

Related

[Completed] HELP unlocking bootloader on GT-i9060i

Hi
I've had some hard time trying to unlock my GT-I9060I's bootloader (so I can install unsigned custom ROMs) but I didn't succeed.
Thins I've tried so far:
Installed Android SDK
Installed ADB and Fastboot drivers
Changed the android driver to Android Bootloader Interface
The problem seems to either be my computer not recognizing the phone in fastboot mode or simply my phone not booting in fastboot mode (even though
HTML:
adb reboot bootloader
rebooted my phone)
How can I unlock my bootloader?
h1ve said:
Hi
I've had some hard time trying to unlock my GT-I9060I's bootloader (so I can install unsigned custom ROMs) but I didn't succeed.
Thins I've tried so far:
Installed Android SDK
Installed ADB and Fastboot drivers
Changed the android driver to Android Bootloader Interface
The problem seems to either be my computer not recognizing the phone in fastboot mode or simply my phone not booting in fastboot mode (even though
HTML:
adb reboot bootloader
rebooted my phone)
How can I unlock my bootloader?
Click to expand...
Click to collapse
Greetings,
Thank you for using XDA Assist.
Please post in our Android hacking and development section here:
http://forum.xda-developers.com/android/help
You'll receive expert advice there. Good luck!

Bricked Pixel 2 - locked bootloader & no access to developer options - please help

Bricked Pixel 2 - locked bootloader & no access to developer options - please help
Hello guys, I just bought myself a Pixel 2 device today and decided to have a go at some changes: I've unlocked my bootloader of my Pixel 2 to perform TWRP flashing & Magisk installation and afterwards I decided to revert to stock.
The first step that I did when trying to revert to stock was to relock the bootloader via adb because I thought (big mistake) this will also revert everything to the factory image. Problem is right now the device isn't booting anymore (so I cannot change anything in developer settings and the bootloader is locked).
Fastboot does work now (I get an "FA8271A02780 fastboot" message when typing fastboot devices) but I cannot flash anything (it always says FAILED: remote Flashing unlock is not allowed.
I tried the Deuces script and UAF but they don't work (because my bootloader is locked). Given that I cannot unlock it, is there any way of flashing the stock image on my device? Any help is appreciated. Thanks a lot.
Sadly I don't believe so. Google doesn't allow us to flash anything without bootloader being unlocked. Other OEMs either have a program or allow you flash signed roms with a locked bootloader. For the trouble iTunes is at least you flash firmware through in the event of a Brick

TWRP / Unlock Bootloader on Cubot P30 (MT6763V)

Hi guys,
im looking forward to unlock the bootloader on my Cubot P30.
The phone is responding in USB debugging moder over the shell, for example when I´m typing "adb devices" or "fastboot reboot bootloader".
But in fastboot afer restart the device unfortunately doesn´t respond.
I even dont really know if the Bootloader is locked or not. The OEM Unlock slider under developer settings is set.
Furthermore The Recovery menu is in chinese, so i also dont know if there is a chance to doublecheck.
I tried flashing an Image over the Shell in case the booloader is unlocked but without success.
Also I cant´t find TWRP for this device, it seems there is no support for Cubot P30, isn´t it.
Hope there is a chance to update the device to Android 10 or Lineage, thanks in advance.
Update: The device is now unlocked. I flashed the Lineage 17.1 and unfortunately the device is still rebooting. Has somone a working image for this device?
Hello, how do you unlock your phone?
Mine Is P40 and same issue.
So if you tell me the way i really appriciate.
Thank you.
Unlock Bootloader & Root Android
Flashing process
1. Unlock Bootloader on Android Devices:
getdroidtips.com/unlock-bootloader-via-fastboot-on-android
2. Install custom recovery:
twrp.me/Devices
3. Root [Download & install supersu.zip via twrp, or root using magisk]:
getdroidtips.com/root-ulefone-power-6

how to unlock galaxy s6 bootlader no OEM option

hello
i have galaxy s6 920F zerofltelgt running with: 10 EvolutionX_4.3_zerofltexx-10.0-20200511-1751-OFFICIAL
in the download mode it shoes: g920k
i want to flash stock rom: G920FXXU6ESA1_G920FXSG6ERL1_G920FXXU6ERL2_HOME.tar
but i cant do that with odin because the bootloader in locked
so i need to unlock it
i find some treads telling that i can find OEM unlock option in developer options, but i dont have that option. i think it just exists in stock roms
i also tried: adb reboot bootloader
but it just reboots and doesnt take me to fastboot
i read abou this software to unlock the bootloader: ZYKUFlasher
but i couldnt find a real link to it, it is safe?
so how to unlock the bootloader?
and is it safe to flash 920F version in 0920K?? or it can brick the phone??
Edit:
the bootloader is not locked, but it was preventing of flashing non 920K version.
so i've downloaded 920K stock rom and flashed it via odin successfully (but it did not boot so i flashed TWRP then a custom ROM)

relock bootloader but no OS help please

hello,
i did unlock the bootloader for my zenfone 7 pro
and installed twrp recovery then rooted via magisk
cuz I wanted voLTE but it didn't work for me so I wanted to be back to stock
I relock the phone using fastboot command
fastboot oem asus-lock
it did relock my phone
but there is no OS nor Recovery !
when I power my phone on the fastboot UI appears. even if I select recovery nothing changes. opens fastboot only
how to re install the firmware ? help plz
in case anyone has the same problem.
i did solve it by flashing the (raw) firmware via fastboot ( Flash_AFT method )
M-772007 said:
hello,
i did unlock the bootloader for my zenfone 7 pro
and installed twrp recovery then rooted via magisk
cuz I wanted voLTE but it didn't work for me so I wanted to be back to stock
I relock the phone using fastboot command
fastboot oem asus-lock
it did relock my phone
but there is no OS nor Recovery !
when I power my phone on the fastboot UI appears. even if I select recovery nothing changes. opens fastboot only
how to re install the firmware ? help plz
Click to expand...
Click to collapse
There are new guides on how to get volte if you want to try again.
[Guide] Easy method to Enable Volte (with root) on Tmobile and maybe other networks on Android 11 and maybe 10
So first you have to root. I used twrp and magisk. There are guides on how to do that you can find by searching around. Then once you do that, follow these directions, What I did was manually entered all of these setprop commands below, on the...
forum.xda-developers.com
This is one but there are others if you need the help.
After relock bootloader i can send phone to warranty?
I tried to relock the phone with the command "fastboot oem asus-lock", but it shows "waitting for any device" and my phone just sit there and do nothing..
Any other method to relock the Zenfone 7 pro?
M-772007 said:
hello,
i did unlock the bootloader for my zenfone 7 pro
and installed twrp recovery then rooted via magisk
cuz I wanted voLTE but it didn't work for me so I wanted to be back to stock
I relock the phone using fastboot command
fastboot oem asus-lock
it did relock my phone
but there is no OS nor Recovery !
when I power my phone on the fastboot UI appears. even if I select recovery nothing changes. opens fastboot only
how to re install the firmware ? help plz
Click to expand...
Click to collapse
I believe that relock is impossible and but to make the device recovery to installed status of stock rom keeping with unlock bootloader.
Please see my post. May make it help or not.
When I try to burn rom with TWRP, img burns but it doesn't start and zip gives an error and cannot burn.
When I first burned custom ROM (unofficial AEX), it did not start, so when I deleted the data from TWRP, it seems that I deleted things that should not be erased, so even if I burn it from the zip file, with the error message in the image below I...
forum.xda-developers.com

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