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[Q] Phone stuck, can't boot

My phone is stuck at the boot logo, and won't fully boot. The boot with the volume down button pressed doesn't work, or even the volume up thing, in order to enter fastboot I need to let it boot up to the logo then run the
Code:
adb reboot-bootloader
command. when i try the
Code:
adb reboot recovery
command, it boots to the oneplus logo, then reboots normally, and I am back to where I was. I cannot flash a new image, because my bootloader is locked, and in order to unlock it, the phone needs to boot up. Is there a way to unlock the bootloader without a full boot? Can I flash without an unlocked bootloader? Is it bricked? please, any feedback would be appreciated.

Beast_Boy said:
My phone is stuck at the boot logo, and won't fully boot. The boot with the volume down button pressed doesn't work, or even the volume up thing, in order to enter fastboot I need to let it boot up to the logo then run the
Code:
adb reboot-bootloader
command. when i try the
Code:
adb reboot recovery
command, it boots to the oneplus logo, then reboots normally, and I am back to where I was. I cannot flash a new image, because my bootloader is locked, and in order to unlock it, the phone needs to boot up. Is there a way to unlock the bootloader without a full boot? Can I flash without an unlocked bootloader? Is it bricked? please, any feedback would be appreciated.
Click to expand...
Click to collapse
So you can't boot into fastboot with the power + volume up button combo after shutting the phone down (hold power)? No you can't unlock bootloader without successfully booting into fastboot. No you can't flash without unlocking the bootloader.

Heisenberg said:
So you can't boot into fastboot with the power + volume up button combo after shutting the phone down (hold power)? No you can't unlock bootloader without successfully booting into fastboot. No you can't flash without unlocking the bootloader.
Click to expand...
Click to collapse
i can only turn the phone on in the normal mode. does this mean it's bricked? do I have to send it in?

Beast_Boy said:
i can only turn the phone on in the normal mode. does this mean it's bricked? do I have to send it in?
Click to expand...
Click to collapse
I would think it's bricked, it's virtually impossible to brick this device. So it'll turn on when the power button is pressed, but it won't actually boot, right? Nothing at all happens when using the fastboot button combo? A little background info would be good, what lead to this situation?

Heisenberg said:
I would think it's bricked, it's virtually impossible to brick this device. So it'll turn on when the power button is pressed, but it won't actually boot, right? Nothing at all happens when using the fastboot button combo? A little background info would be good, what lead to this situation?
Click to expand...
Click to collapse
The button combos do nothing, not even boot the device normally.
So, what happened is this: I was trying to root my phone, I plugged it into a windows 8.1 machine, and I was following a tutorial by C4Etech. It was working fine, until I unlocked the bootloader, after the it was unlocked, my machine could no longer recognize my device. I uninstalled and reinstalled countless drivers multiple times in an attempt make my machine recognize my device, rebooted my phone, my computer., the adb server, and anyhting else I could. Nothing worked. Angry and frustrated, I plugged it into my Linux Mint machine, and it recognized perfectly! because I am a noob, and have never done anything like this before, I began to panic when I saw that my phone wouldn't reboot like they did in the tutorials right after they unlocked the bootloader, so I skipped that part, and continued with the flashing. after flashing, my phone would no longer boot, so I thought I messed up with the unlocking portion because my phone wouldn't reboot after the "fastboot oem unlock" ( because I am a noob, I thought that the unlock was temporary, and that my many reboots of the phone managed to undo it.). thinking the unlock was the culprit to my broken phone, and thought adb must be glitched since it doesn't reboot after "fastboot oem unlock" like it did in the tutorials, like a genius, i typed in "fastboot oem lock" rebooted into fastmode, then typed in "fastboot oem unlock". I was filled with joy when I saw my phone reboot like it did in the tutorials, but my joy began to fade, as the phone was still booting after several minutes. And thats when I died inside, and began posting on many online forums, because google couldn't find anything that matched my situation.
the button combos stopped working after the flash.

Beast_Boy said:
The button combos do nothing, not even boot the device normally.
So, what happened is this: I was trying to root my phone, I plugged it into a windows 8.1 machine, and I was following a tutorial by C4Etech. It was working fine, until I unlocked the bootloader, after the it was unlocked, my machine could no longer recognize my device. I uninstalled and reinstalled countless drivers multiple times in an attempt make my machine recognize my device, rebooted my phone, my computer., the adb server, and anyhting else I could. Nothing worked. Angry and frustrated, I plugged it into my Linux Mint machine, and it recognized perfectly! because I am a noob, and have never done anything like this before, I began to panic when I saw that my phone wouldn't reboot like they did in the tutorials right after they unlocked the bootloader, so I skipped that part, and continued with the flashing. after flashing, my phone would no longer boot, so I thought I messed up with the unlocking portion because my phone wouldn't reboot after the "fastboot oem unlock" ( because I am a noob, I thought that the unlock was temporary, and that my many reboots of the phone managed to undo it.). thinking the unlock was the culprit to my broken phone, and thought adb must be glitched since it doesn't reboot after "fastboot oem unlock" like it did in the tutorials, like a genius, i typed in "fastboot oem lock" rebooted into fastmode, then typed in "fastboot oem unlock". I was filled with joy when I saw my phone reboot like it did in the tutorials, but my joy began to fade, as the phone was still booting after several minutes. And thats when I died inside, and began posting on many online forums, because google couldn't find anything that matched my situation.
the button combos stopped working after the flash.
Click to expand...
Click to collapse
Have you seen this?
http://forum.xda-developers.com/oneplus-one/help/guide-unbrick-oneplus-one-t3013732
Might be worth a try.

Can't unlock bootloader

Hi there,
I think i bought a fake Samsung Galaxy S6. But it works well, and it looks identical and has most of the futures of the real Galaxy s6.
As a fake Samsung phone, it doesn't have any Odin Download mode in it. So i tried to get into the bootloader via adb "adb reboot bootloader".
When i get there, i try to unlock the bootloader "fastboot oem unlock".
On the screen of the Phone i get a message about the fact im trying to unlock the bootloader etc. Press volume up to Unlock, Press Volume down to cancel.
The problem is, I can't press Volume Up for some reason, only Volume down. So i can't unlock the Bootloader to install custom recovery via ADB and finally install custom ROM.
Anyone any help? I can only access Stock recovery menu, some chinese test menu and the bootloader. Thats it.
Any help would be appreciated, i can provide any info you will possibly need.
grtz, Alex

Help unlocking/rooting Lenovo Vibe C2 K10a40

So guys, the thing is: I haven't found a way to root nor to unlock the bootloader in this phone.
Focusing on the bootloader, there is an option in the Developer options which says "OEM unlocking", that supposedly allows the bootloader to be unlocked. Plugging the phone on the pc USB and using adb to get into fastboot works fine, but after typing "fastboot flashing unlock" the command prompt keeps on waiting with "..." for the next phone's action, that's where the problem begins: on the cellphone screen, right after the warnings about the consequences of unlocking the bootloader, appears: "Press the Volume UP/Down buttons to select Yes or No." If Volume_Down is pressed, it returns to fastboot, but if Volume_UP is pressed nothing happens, literally nothing, Power button also does nothing, the only one who works is Volume_Down, making it unable to unlock the bootloader via this method.
I tried to use "adb shell input keyevent 24" (knowing it wouldn't work) to try to send the Volume_Up command from the pc.
So I wanna know if there is a way that, through that fastboot waiting instance (the three dots "..."), I can send the Volume_Up command from the pc, enabling the Bootloader to be unlocked, making the root easy or even possible.
Thanks in advance!

Matt1355 said:
So guys, the thing is: I haven't found a way to root nor to unlock the bootloader in this phone.
Focusing on the bootloader, there is an option in the Developer options which says "OEM unlocking", that supposedly allows the bootloader to be unlocked. Plugging the phone on the pc USB and using adb to get into fastboot works fine, but after typing "fastboot flashing unlock" the command prompt keeps on waiting with "..." for the next phone's action, that's where the problem begins: on the cellphone screen, right after the warnings about the consequences of unlocking the bootloader, appears: "Press the Volume UP/Down buttons to select Yes or No." If Volume_Down is pressed, it returns to fastboot, but if Volume_UP is pressed nothing happens, literally nothing, Power button also does nothing, the only one who works is Volume_Down, making it unable to unlock the bootloader via this method.
I tried to use "adb shell input keyevent 24" (knowing it wouldn't work) to try to send the Volume_Up command from the pc.
So I wanna know if there is a way that, through that fastboot waiting instance (the three dots "..."), I can send the Volume_Up command from the pc, enabling the Bootloader to be unlocked, making the root easy or even possible.
Thanks in advance!
Click to expand...
Click to collapse
Just because you have the "OEM unlock" option in settings doesn't necessarily mean you can unlock bootloader, the manufacturer or your carrier may have disabled that option in fastboot. Not all devices can be unlocked.
Sent from my SM-S903VL using Tapatalk

still waiting for rooting app, too...

Why God! Why??!! Why Google & Lenovo d'nt just make possible 4 rooting?

Kirzoczek said:
Why Godzin why??!! Why Google d'nt just make possible 4 rooting?
Click to expand...
Click to collapse
Well i'm pissed of. Lenovo just turn off vol up button. U just can't press it in fastboot mode to unlock bootloader. F...... ?

Kirzoczek said:
Why God! Why??!! Why Google & Lenovo d'nt just make possible 4 rooting?
Click to expand...
Click to collapse
Google isn't the the one that has control of that, that's controlled by the device manufacturers and/or each mobile carrier. In this case, it's controlled by Lenovo
The only devices that Google has control over whether they're rootable or not is only the Nexus and Pixel devices, not any of the others.
I DO NOT PROVIDE HELP IN PERSONAL MESSAGE, I DO NOT TAKE REQUESTS IN PERSONAL MESSAGE, YOU WILL BE IGNORED. KEEP IT IN THE THREADS WHERE EVERYONE CAN SHARE
---------- Post added at 04:01 PM ---------- Previous post was at 03:47 PM ----------
Matt1355 said:
So guys, the thing is: I haven't found a way to root nor to unlock the bootloader in this phone.
Focusing on the bootloader, there is an option in the Developer options which says "OEM unlocking", that supposedly allows the bootloader to be unlocked. Plugging the phone on the pc USB and using adb to get into fastboot works fine, but after typing "fastboot flashing unlock" the command prompt keeps on waiting with "..." for the next phone's action, that's where the problem begins: on the cellphone screen, right after the warnings about the consequences of unlocking the bootloader, appears: "Press the Volume UP/Down buttons to select Yes or No." If Volume_Down is pressed, it returns to fastboot, but if Volume_UP is pressed nothing happens, literally nothing, Power button also does nothing, the only one who works is Volume_Down, making it unable to unlock the bootloader via this method.
I tried to use "adb shell input keyevent 24" (knowing it wouldn't work) to try to send the Volume_Up command from the pc.
So I wanna know if there is a way that, through that fastboot waiting instance (the three dots "..."), I can send the Volume_Up command from the pc, enabling the Bootloader to be unlocked, making the root easy or even possible.
Thanks in advance!
Click to expand...
Click to collapse
The command is supposed to be
fastboot OEM unlock
I DO NOT PROVIDE HELP IN PERSONAL MESSAGE, I DO NOT TAKE REQUESTS IN PERSONAL MESSAGE, YOU WILL BE IGNORED. KEEP IT IN THE THREADS WHERE EVERYONE CAN SHARE

Yes, you have right. But what with this vol+ button?

Volume+ button is not working on Lenovo C2 ?

GPSSlovakia said:
Volume+ button is not working on Lenovo C2 ?
Click to expand...
Click to collapse
I mean that vol up did' t work in fastboot mode. When u try to unblock bootloader u have two options. U may choose yes or no. Offously vol up is for "yes" answer. And whoop!!! It don't work

How to restore the imei number of this phone ..i tried several methods to restore..pls help me

rijukrishnan said:
How to restore the imei number of this phone ..i tried several methods to restore..pls help me
Click to expand...
Click to collapse
If you didn't make an IMEI backup then we can't discuss restoring your IMEI at XDA, it's in the Forum Rules.
Sent from my SM-S903VL using Tapatalk

then what can i do next to make it in stock condetion

What is this message means

rijukrishnan said:
What is this message means
Click to expand...
Click to collapse
I think it is saying that the connection between PC and your device was interrupted for some reason. I was probably a problem with your cable being loose and losing connection where it plugs into your device.
It is not very likely but it could also be an unstable electrical supply grid in your area, the power in the building where you are could have dropped momentarily, I doubt this was the cause though, but it is one possibility.
Use a different cable or find a way to make sure it connects and stays connected, then try flashing again.
The error you have is described in the attachment below, it explains how to solve.
For future reference, the link below has a list of all flash tool errors and how to solve them.
https://forum.hovatek.com/thread-439.html
Sent from my SM-S903VL using Tapatalk

Droidriven said:
If you didn't make an IMEI backup then we can't discuss restoring your IMEI at XDA, it's in the Forum Rules.
Click to expand...
Click to collapse
i have a bckup of imei number

Eh..,,.... no unlock oem ... no root , bad phone

Droidriven said:
Just because you have the "OEM unlock" option in settings doesn't necessarily mean you can unlock bootloader, the manufacturer or your carrier may have disabled that option in fastboot. Not all devices can be unlocked.
Sent from my SM-S903VL using Tapatalk
Click to expand...
Click to collapse
You can access the recovery for this model after you send the command (ADB and fastboot commands): "Adb reboot recovery" where "Adb reboot boot loader" and then you have to click on the volume up and the power button at the same time and its success
* But the problem is that I have not found the trwp compatible with this model to make the root that can help us

medzbody said:
You can access the recovery for this model after you send the command (ADB and fastboot commands): "Adb reboot recovery" where "Adb reboot boot loader" and then you have to click on the volume up and the power button at the same time and its success
* But the problem is that I have not found the trwp compatible with this model to make the root that can help us
Click to expand...
Click to collapse
TWRP for your device probably doesn't exist, you'll have to wait for someone to be interested in building TWRP for your model (not likely to happen if it hasn't already) or you can port or build your own TWRP.
Sent from my SM-S903VL using Tapatalk

Droidriven said:
TWRP for your device probably doesn't exist, you'll have to wait for someone to be interested in building TWRP for your model (not likely to happen if it hasn't already) or you can port or build your own TWRP.
Sent from my SM-S903VL using Tapatalk
Click to expand...
Click to collapse
I do not know how to build twrp for my device you can help me

What about making a TWRP and then flashing it thru modified scatter file in flash tool

Can I relock bootloader after chinese rom / 8.1 update to enable andriod pay?

I had one of the phones with the garbage global roms and updated the device with the chinese rom hikari_calyx provided. I then updated to 8.1. Is it now possible for me to relock my device safely? Has anyone done this? I would like to have andriod pay.
Thanks in advance.

Yes you can My bootloader is locked again with Chinese stock android.
1. Go into Download Mode.
2. Start Minimal ADB & Fastboot.
3. Use the command
Code:
fastboot oem lock
You will get asked if you want to lock the bootloader again, select yes:
4. Press volume +, then press power button
Good luck

Robin>Hood said:
Yes you can My bootloader is locked again with Chinese stock android.
1. Go into Download Mode.
2. Start Minimal ADB & Fastboot.
3. Use the command
Code:
fastboot oem lock
You will get asked if you want to lock the bootloader again, select yes:
4. Press volume +, then press power button
Good luck
Click to expand...
Click to collapse
Here is a howto that Robinhood created: https://forum.xda-developers.com/nokia-7/how-to/guide-how-to-recovery-mode-t3813950/
Mine worked as well. *Note* I was stuck on the NOKIA screen after subsequent reboot and thought I bricked my phone. The next reset took a long time on NOKIA screen as well. Phone updated latest security patch and again, long reboot time. Afterwards, normal / fast reboot times without issue. I am not able to get 4G/LTE in Canada: I am not a phone person so i don't know if thats a function of the rom or hardware but just reporting in case it is of interest.

[GUIDE][WINDOWS][LINUX] How to unlock your bootloader ! Official and Unofficial way

Hi all,
The main advantage of unlocking the bootloader on Android is rooting. If you want your Android is rooted or if you want a custom ROM to install the unlocking bootloader is an initial step.
/!\ This will erase all of your data !!
You are using Windows ?
Simple but unofficial method :
1) On your device, enable developer options by going to Settings > About Phone, scroll down to Build number and tap 5-7 times to enable developer option.
2) Once you enabled the Developer Options. Returned back to Settings > Developer Options > USB Debugging and OEM Unlock. Just Enable there options.
3) Proceed to put your Xiaomi Mi A2 Lite into Fastboot mode by powering it on while holding Volume Down and Power buttons simultaneously. Hold until you see your phone is booted into Fastboot mode, now connect your phone to your computer.
4) Download Minimal ADB and Fastboot here : https://androidfilehost.com/?fid=962187416754459552
5) Now it’s time to unlock your phone,
Open in operator mode Minimal ADB and Fastboot and enter this command :
Code:
fastboot oem unlock
Your phone will reboot and your data will be erased but your bootloader is now unlocked !
Long but official method :
This method require some days because you have to ask xiaomi to send you an unlock code.
1) On your device, enable developer options by going to Settings > About Phone, scroll down to Build number and tap 5-7 times to enable developer option.
2) Once you enabled the Developer Options. Returned back to Settings > Developer Options > USB Debugging and OEM Unlock. Just Enable there options.
3) Proceed to put your Xiaomi Mi A2 Lite into Fastboot mode by powering it on while holding Volume Down and Power buttons simultaneously. Hold until you see your phone is booted into Fastboot mode, now connect your phone to your computer.
4) Go to http://en.miui.com/unlock, click on Unlock button on the webpage now you have to login and then proceed to tap on Download Mi Unlock from the resulting page.
5) After the successful login, the validation process will start on your phone, and for the first time, you will get a message that “You don’t have the permission to Unlock the device”
4) Now click on the “Go” button or use Go to MIUI Unlock page to receive the unlocking permission.
5) Now click on the Unlock Now and log in with your Mi account details and fill all details.
6) You will get a password for confirmation use it to complete the process.
7) Now wait until your application gets approved, you will receive the password on your phone number once it’s approved.
8) Now Open the Mi Flash tool click on unlock and pass the two pop-up.
Your phone will reboot and your data will be erased but your bootloader is now unlocked !
You are using Linux ?
Simple and unofficial methods, official methods doesn't work on linux :
1) On your device, enable developer options by going to Settings > About Phone, scroll down to Build number and tap 5-7 times to enable developer option.
2) Once you enabled the Developer Options. Returned back to Settings > Developer Options > USB Debugging and OEM Unlock. Just Enable there options.
3) Proceed to put your Xiaomi Mi A2 Lite into Fastboot mode by powering it on while holding Volume Down and Power buttons simultaneously. Hold until you see your phone is booted into Fastboot mode, now connect your phone to your computer.
4) Enter these commands in the Terminal :
Code:
sudo apt-get install fastboot
Code:
sudo apt-get install adb
5) Now it’s time to unlock your phone,
In terminal enter this command :
Code:
fastboot oem unlock
Your phone will reboot and your data will be erased but your bootloader is now unlocked !
Thanks Kineceleran for a solution to avoid the erasing data (I don't test it),
When you get in to fastboot mode hold to volume down button before and write "fastboot oem unlock" don't release until phone shows mi logo at the startup.
PS: Sorry for my bad English
Pierre
If I help you, drop a thanks

Actually you could avoid the erasing data
When you get in to fastboot mode
hold to volume down button before and write "fastboot oem unlock" code
dont release until phone shows mi logo at the startup.

Kineceleran said:
Actually you could avoid the erasing data
When you get in to fastboot mode
hold to volume down button before and write "fastboot oem unlock" code
dont release until phone shows mi logo at the startup.
Click to expand...
Click to collapse
Thanks for that I added this in the main post

Pierre_C said:
Thanks for that I added this in the main post
Click to expand...
Click to collapse
Usually i select the option "clean all and lock" on mi flash when i flash stock rom(for being pure).
I tried vol down method several times you can try this
sorry for my bad english tho :/

ohh no, the 100st thread about unlocking bootloader on original android-devices. And that in double

harvey said:
ohh no, the 100st thread about unlocking bootloader on original android-devices. And that in double
Click to expand...
Click to collapse
Yes but not for the Mi A2 lite and double post is a mistake

Pierre_C said:
Yes but not for the Mi A2 lite and double post is a mistake
Click to expand...
Click to collapse
And whats the difference between "fastboot unlock oem" for windows/linux or unlocking mia2 or mia2lite or google-pixels? There is no.
by the way: your tip on linux to make an "apt-get install fastboot/adb" could load an older version of this apps (depends on the distribution) which are not able to handle a/b formatted phones. so be careful!
Everybody who wants to root looks at the "rooting" threads, and in the a2lite threads for rooting in their 1st posts you can read how to unlock bootloader. No necessary for another "tutorial" imho.
And another by the way: Why is the fastboot-method "inofficial"? That are the tools from google themself for developing android.
Your "official way" is only needed if you have xiamoi-phone with miui on it.

What's the point of requesting the bootloader unlocking code from Xiaomi if it's as simple as running a command in fastboot with no strings attached?! Am I missing something?
Can someone clarify if the Mi A2 Lite, not being a MIUI device, needs the Xiaomi Unlocking procedure?
NOTE: Afaik, avoiding the data-wipe after unlocking the bootloader works for as long as you don't go into recovery mode, because the wiping task stays pending forever and some day you'll enter recovery and get your phone wiped anyway.

joint.striker said:
What's the point of requesting the bootloader unlocking code from Xiaomi if it's as simple as running a command in fastboot with no strings attached?! Am I missing something?
Can someone clarify if the Mi A2 Lite, not being a MIUI device, needs the Xiaomi Unlocking procedure?
NOTE: Afaik, avoiding the data-wipe after unlocking the bootloader works for as long as you don't go into recovery mode, because the wiping task stays pending forever and some day you'll enter recovery and get your phone wiped anyway.[/QUOTE
yes sounds not too good ending up with a wiped storage all of a sudden, but if after unlocking bootloader you install twrp and root the phone iam pretty sure the pending wipe will be gone, cheers
Click to expand...
Click to collapse

just to be clear whats the difference between the official and unofficial way?
does warranty status change depending on which way you use?

joint.striker said:
NOTE: Afaik, avoiding the data-wipe after unlocking the bootloader works for as long as you don't go into recovery mode, because the wiping task stays pending forever and some day you'll enter recovery and get your phone wiped anyway.
Click to expand...
Click to collapse
Can someone confirm this? I'm about to root one A2 Lite and would love to keep the data on.
Thanks!

Does this unlock process on linux works for xiomi MI redmi note 5 pro or not...!

Hi.
I'm trying to unlock A2 Lite from EndeavourOS (Arch Linux).
Installed ADB/fastboot (sudo pacman -S android-tools):
Android Debug Bridge version 1.0.41
Version 33.0.3p1-android-tools
However when executing "fastboot oem unlock" command, it hangs with the below:
< waiting for any device >
The device itself is visible when checking with "adb devices" command:
List of devices attached
3e334c3d0205 device
Are there perhaps some additional steps or soft I'm missing? Any idea what could be wrong?
Thanks in advance.

Hi,
Here is a great way to do it. Worked very well for me:
https://forum.xda-developers.com/t/guide-vm-xiaomi-unlock-bootloader-using-linux-and-mi-unlock-tool-or-any-other-virtual-machine.4569985/