Develop Bugs

[Q] Nexus 7v 2 Bootloader cannot be unlocked

Yesterday, I have tired several time, several tools to unlock my N7v2 bootloader. However, they all freezed on UNLOCK BOOTLOADER option on my device. (The process stucked after I pressed "Yes" and cannot go back to fastboot:crying. So I guess there's a problem with my bootloader, right? Please help me

Does your tablet reboot into bootloader?
If so just go in your adb directory and type
fastboot oem unlock

sfhub said:
Does your tablet reboot into bootloader?
If so just go in your adb directory and type
fastboot oem unlock
Click to expand...
Click to collapse
And do note that after pressing yes the device wipes all data and reboots itself. This can take 5-10 minutes.

sfhub said:
Does your tablet reboot into bootloader?
If so just go in your adb directory and type
fastboot oem unlock
Click to expand...
Click to collapse
I did what you said and typed fastboot oem unlock in cmd, then, the device rebooted into bootloader and unlock bootloader screen, but the failure was shown on cmd (unknown error, code error or something), then the device freezed on Yes&No in unlock bootloader. It's really strange.

Coronado is dead said:
And do note that after pressing yes the device wipes all data and reboots itself. This can take 5-10 minutes.
Click to expand...
Click to collapse
It's been stucked there more than 20mins```

jianada520 said:
I did what you said and typed fastboot oem unlock in cmd, then, the device rebooted into bootloader and unlock bootloader screen, but the failure was shown on cmd (unknown error, code error or something), then the device freezed on Yes&No in unlock bootloader. It's really strange.
Click to expand...
Click to collapse
You need to press VolUp to highlight Yes, then power to select

sfhub said:
You need to press VolUp to highlight Yes, then power to select
Click to expand...
Click to collapse
yup. I pressed VolUP to highlight Yes, power buttom to select. then it stucked T_T

Press power button for 60 seconds and try again

sfhub said:
Press power button for 60 seconds and try again
Click to expand...
Click to collapse
well...cmd shown Failed(unknown status code) after typed in fastboot oem unlock.Then, pressed Yes and freezed again omg... I have tired 3 times

jianada520 said:
well...cmd shown Failed(unknown status code) after typed in fastboot oem unlock.Then, pressed Yes and freezed again omg... I have tired 3 times
Click to expand...
Click to collapse
After it fails and you reboot, is the BL still locked at this point or is it unlocked already? Perhaps, it is already unlocked and you may just need to factory reset to get the device to fully boot up.
The little lock symbol on the boot screen will show a small break if the BL is unlocked.

jianada520 said:
well...cmd shown Failed(unknown status code) after typed in fastboot oem unlock.Then, pressed Yes and freezed again omg... I have tired 3 times
Click to expand...
Click to collapse
What the previous post said.
Also are you by chance using usb 3 port?

cowabunga said:
After it fails and you reboot, is the BL still locked at this point or is it unlocked already? Perhaps, it is already unlocked and you may just need to factory reset to get the device to fully boot up.
The little lock symbol on the boot screen will show a small break if the BL is unlocked.
Click to expand...
Click to collapse
It's still locking, and shows a locked status on the fastboot screen...I have done factory reset several times,but nothing was changed

sfhub said:
What the previous post said.
Also are you by chance using usb 3 port?
Click to expand...
Click to collapse
nope, it's all usb 2 port. All drivers are installed correctly, and it shows success after perform the Wug's NRT 1.71 full driver test .

sfhub said:
Press power button for 60 seconds and try again
Click to expand...
Click to collapse
wow, i finally unlocked it. I reinstalled bootloader interface while the device was freezing :victory:. It such a miracle. Thx for assisting me.:laugh:

jianada520 said:
wow, i finally unlocked it. I reinstalled bootloader interface while the device was freezing :victory:. It such a miracle. Thx for assisting me.:laugh:
Click to expand...
Click to collapse
What does "reinstalled bootloader interface" mean anyhow? You flash the bootloader again onto the device from the factory image? Or did you have to reinstall something on your computer (ie. drivers, etc...)?
Would be helpful to clarify for anyone who hits this thread in the future.

cowabunga said:
What does "reinstalled bootloader interface" mean anyhow? You flash the bootloader again onto the device from the factory image? Or did you have to reinstall something on your computer (ie. drivers, etc...)?
Would be helpful to clarify for anyone who hits this thread in the future.
Click to expand...
Click to collapse
It means I reinstalled bootloader interface driver on PC while the device was stucking on UNLOCK BOOTLOADER option screen.(after selected Yes). It suddenly turned into fastboot screen and continued to finish rest of processes. I hope this would be helpful for people who hits this thread. Make sure your USB drivers are installed correctly , because they seem installed correctly but actually not. If you got stuck on UNLOCK BOOTLOADER screen, try to reinstall it or install another usb driver..

Just wanted to say that this worked for me too!
I would get to the point where I would have to pick 'Yes' on the Nexus 7 screen using the volume buttons, and then when I would press the power button to confirm, it would just freeze. The volume buttons would not respond and I had to hard reboot by holding down the power button.
I just tried jianada520's method of getting to the 'freeze' point, and then I did this:
-Keep the tablet plugged in
-Open Device Manager and right click > uninstall the Android ADB interface and remove the driver
-Install the Driver (I used the Nexus Root Toolkit and installed/repaired the Universal Driver)
-Back on the Device Manager - Scan for hardware Changes
-Nexus should be detected and some kind of driver is installed
At this point the screen went back to the Bootloader menu automatically, but it now says 'LOCK STATE - unlocked', success!
Just thought I'd add my experience as this was sending me in circles for the past 2 hours of rebooting, reinstalling drivers etc.

dodgyc said:
Just wanted to say that this worked for me too!
I would get to the point where I would have to pick 'Yes' on the Nexus 7 screen using the volume buttons, and then when I would press the power button to confirm, it would just freeze. The volume buttons would not respond and I had to hard reboot by holding down the power button.
I just tried jianada520's method of getting to the 'freeze' point, and then I did this:
-Keep the tablet plugged in
-Open Device Manager and right click > uninstall the Android ADB interface and remove the driver
-Install the Driver (I used the Nexus Root Toolkit and installed/repaired the Universal Driver)
-Back on the Device Manager - Scan for hardware Changes
-Nexus should be detected and some kind of driver is installed
At this point the screen went back to the Bootloader menu automatically, but it now says 'LOCK STATE - unlocked', success!
Just thought I'd add my experience as this was sending me in circles for the past 2 hours of rebooting, reinstalling drivers etc.
Click to expand...
Click to collapse
Congratz. You explained the solution very clear.

Root/Unlock/CM for Sony Xperia ION L28h?

If some one maybe please i`ve been searching the whole day on how to find root and unlock the bootloader for ION L28H ...i tried to unlock via the official way but when i press the VOL UP button and put the usb the LED lights up and after a few secs the SONY logo shows up...

halaf17 said:
If some one maybe please i`ve been searching the whole day on how to find root and unlock the bootloader for ION L28H ...i tried to unlock via the official way but when i press the VOL UP button and put the usb the LED lights up and after a few secs the SONY logo shows up...
Click to expand...
Click to collapse
these are the possible reasons for that to happen
1) u dont hav the drivers for ur phone
download "pdaNet"(just search in google) install with ur phone connected.
2)if u r using USB 3.0 connect to USB 2.0
in my laptop i cant enter fastboot when i connect it to usb 3.0
samething happened to me too at first this fixed it.

abhaysk94 said:
these are the possible reasons for that to happen
1) u dont hav the drivers for ur phone
download "pdaNet"(just search in google) install with ur phone connected.
2)if u r using USB 3.0 connect to USB 2.0
in my laptop i cant enter fastboot when i connect it to usb 3.0
samething happened to me too at first this fixed it.
Click to expand...
Click to collapse
Tried to install pdaNet...failed ...after the instalation it asks me to put my usb cable on my phone i do that while usb debuging is allowed...and it says failed blabla :/

halaf17 said:
Tried to install pdaNet...failed ...after the instalation it asks me to put my usb cable on my phone i do that while usb debuging is allowed...and it says failed blabla :/
Click to expand...
Click to collapse
Are you sure it says that your bootloader can be unlocked in service menu
7378423 in dialer i think
Sent from my Xperia ion using XDA Premium 4 mobile app

If some one can find me a way to unlock the bootloader on L28H i will be very glad...cuz i just bricked my phone and i`m flashing a rom for locked bootloaders

Go to: http://unlockbootloader.sonymobile.com/ and read everything!
At the bottom click 'Start Unlocking the Bootloader'
Quote:
First, you should confirm that it is possible to unlock the boot loader of your phone by checking the service menu. In your phone, open the phone dial pad and enter *#*#7378423#*#* to access the service menu.
In your phone, tap Service info > Configuration > Rooting Status. If Bootloader unlock allowed says Yes, then you can continue with the next step. If it says No, or if the status is missing, your device cannot be unlocked.
After you have verified that you can unlock bootloader, scroll to the bottom of the page and click "Continue"
You will get "Are you sure prompt" accept it by clicking "yes i am sure" (i assume that you have read an understood it)
Then accept the "legal terms"
Finally you will get a "Create Unlock request" page, enter your IMEI (sometimes the last digit needs to be removed for this to work), name and email address
You should now receive your unique unlock key, its displayed on screen, SAVE THIS KEY SAFELY
Extract fastboot_with_Android_USB_file.rar and open fastboot folder
Hold SHIFT and right click on the background of the folder
Select 'Open command window here'
Connect your phone in fastboot mode (turn phone off, hold Volume UP button and plug in USB Cable) [make sure drivers are installed as explained above)
In the cmd windows type in fastboot.exe -i 0x0fce getvar version
If a value is returned (it will return 0.5), it means the phone is correctly connected
Type in fastboot.exe -i 0x0fce oem unlock 0xKEY and replace KEY with the key which you received earlier.
Your device should now be bootloader unlocked
From here- http://forum.xda-developers.com/showthread.php?t=1753261
Is the same for any ION. Some can be unlocked, some can not be unlocked.

halaf17 said:
If some one maybe please i`ve been searching the whole day on how to find root and unlock the bootloader for ION L28H ...i tried to unlock via the official way but when i press the VOL UP button and put the usb the LED lights up and after a few secs the SONY logo shows up...
Click to expand...
Click to collapse
do you have the Unlock key from sony?
and what happens when you plug in the USB cable? I didnt faced the any issue with USB 3.0 at all but it may be an factor for you.

NISHANTJ_2K said:
do you have the Unlock key from sony?
and what happens when you plug in the USB cable? I didnt faced the any issue with USB 3.0 at all but it may be an factor for you.
Click to expand...
Click to collapse
Yes i have the key from Sony but when i connect the phone to pc in fastboot my PC says that it could not recognize it and my phone then boots to the battery logo....EVEN THOUGH i have installed the DRIVERS via the flashtool (flashtool drivers)

halaf17 said:
Yes i have the key from Sony but when i connect the phone to pc in fastboot my PC says that it could not recognize it and my phone then boots to the battery logo....EVEN THOUGH i have installed the DRIVERS via the flashtool (flashtool drivers)
Click to expand...
Click to collapse
then try to boot in fastboot mode via flash tool itself.
once device is in fast boot mode follow the instructions to unlock the boot loader. and It is not necessary to unlock bootloader to install custom rom. it is only required if you want to install custom kernel. recovery can be installed without unlocked boot loaer.

No fastboot option

Can't find anything on these forums or with google on this issue:
Unlocked HTC 10 purchased directly from HTC last week, received yesterday, running with AT&T SIM. Trying to unlock bootloader with HTCDEV but when I boot to bootloader or download mode there is no option for fastboot! Volume down + power brings me to download mode, my options are system info, show barcode, reboot to bootloader, reboot to download mode, reboot, power down. Tried reboot to bootloader. Phone reboots, says ***LOCKED***, ***S-ON*** and I have the options for reboot, reboot to bootloader, boot to download mode, boot recovery mode. I've ensured USB debug is ticked and OEM unlocked is allowed. I'm afraid I'm missing something obvious but I've used fastboot a fair bit on my m8 so I know what I'm looking for. I put a call in to HTC and their "special Bootloader Unlock team" is supposed to email me in the next 3 to 5 business days.
Tried a hard reset, didn't help.
All I could find on Google is some folks discussing an issue in earlier models of HTC phones - in those cases something about unticking fastboot in the "battery" menu of settings seemed to help but I can find no such options in the marshmallow variant on my phone. The HTCDEV site offers:
"If you have difficulty, power up normally, go to Settings->Battery and deselect Fast boot. Power down and try again." Must be referring to something from an older device because Settings --> Battery does not exist and Settings --> Power does not have a "Fast boot" option I can find to deselect.
Anyone have any thoughts?
Thanks...

It's has been renamed to "download mode" since M9 I think.

theres no fastboot option, it was changed to download mode on recent htc devices
once you're in phones in download mode & you have fastboot open on your pc
type "fastboot oem get_identifier_token"
the rest should be pretty easy

Htcdev explains all that on the first page of instructions as well.

Oops, got it...
metalfan78 said:
Htcdev explains all that on the first page of instructions as well.
Click to expand...
Click to collapse
Thanks guys, sure enough I was connected all along. I should have been able to figure that one out!
I'm not so sure Htcdev "explains all that" though. On the contrary, their instructions were the source of confusion! The first page says to "Use the Volume buttons to select up or down. Highlight Fastboot and press the Power button." Their note of clarification does not help, launching into a discussion of enabling OEM unlock. They ought to update that. Why on Earth would it be clear to me that connecting in 'download mode' instead of 'bootloader mode' voids their specific instruction to "select fastboot and press the power button"?
Anyhoo, all set with a freshly unlocked bootloader, thanks again.

Hello there...
Can you Please tell where the download option is available in HTC devices?

aashish981 said:
Hello there...
Can you Please tell where the download option is available in HTC devices?
Click to expand...
Click to collapse
Some custom ROM's allow you to reboot to download mode via the power menu. If you're stock, power off the phone. Once it's off, hold volume down+power. Once the black HTC screen appears release both buttons. The phone will boot into download mode.
Sent from my HTC 10

how to check if bootlader is locked

Hi Folks
I just got the Media Pad M2 8.0 and I want to check if the bootloader is locked or not
because there is no dialer installed I can't use the code I found in other forums
is there another way to find out?

hingerl said:
Hi Folks
I just got the Media Pad M2 8.0 and I want to check if the bootloader is locked or not
because there is no dialer installed I can't use the code I found in other forums
is there another way to find out?
Click to expand...
Click to collapse
Yes, there should be. You need to enter fastboot mode on the phone - i.e you need to get into the bootloader screen. The bootloader screen (usually called fastboot mode) will tell you if the bootloader and FRP are locked or unlocked - If it is locked, you should see "PHONE Locked" and "FRP Lock" in green, otherwise it should say "PHONE Unlocked" and "FRP Unlock" in red if the phone has been properly unlocked.
You can enter fastboot mode by either using ADB ("adb reboot bootloader", first make sure to enable developer options first as detailed in the Rooting guide, and then enabled USB debugging), or by first shutting down the phone and then powering it up while holding down the VOLDN (Volume Down) key. Of the two methods, I'd recommend the ADB method because the hardware keys method is usually hit-or-miss for me - sometimes it takes me to the bootloader, sometimes it boots normally into the ROM.
If you're on Windows and need the ADB and fastboot binaries, you can install the "15-second ADB installer" found in this thread.

Thanks, that worked, took me a while to figure everything out...
and it appears that my device is unlocked...

Bootloading Kyocera DuraXV Extreme

Hello, I'm having some serious trouble bootloading my Kyocera DuraXV Extreme (AOSP)
I've went into developer options and activated USB debugging and allowed OEM unlocking.
But I get stuck on rebooting into bootloader mode. I've tried different approaches:
1. Starting up phone while holding volume up and down buttons. Then select "reboot to bootloader".
2. adb reboot bootloader command
Both options reboot the phone without going into bootloader mode.
Seems Kyocera decided to somehow lock the bootloader mode. Anyone know of a workaround here?

jonas.sj said:
Hello, I'm having some serious trouble bootloading my Kyocera DuraXV Extreme (AOSP)
I've went into developer options and activated USB debugging and allowed OEM unlocking.
But I get stuck on rebooting into bootloader mode. I've tried different approaches:
1. Starting up phone while holding volume up and down buttons. Then select "reboot to bootloader".
2. adb reboot bootloader command
Both options reboot the phone without going into bootloader mode.
Seems Kyocera decided to somehow lock the bootloader mode. Anyone know of a workaround here?
Click to expand...
Click to collapse
My comments below are based on the belief that you are trying to unlock the bootloader.
I am not familiar with this phone but generally the two steps mentioned by you are not enough to unlock the bootloader. After those steps, you'll have to issue a command via adb to unlock the bootloader and if successful, then you can boot into it for further operations. The command will vary between devices, so search and profit.

Thanks, this cleared it up a bit, you are right, I'm trying to unlock it.
I'm trying the command fastboot flashing unlock but only getting the message < waiting for any device >. I read somewhere that I might need some USB drivers but I don't know where to find them. I have the latest version of the standard USB drivers for the phone, but as I understand it I need special drivers for this?

I'm trying to follow the steps here: https://www.ifixit.com/Guide/How+to+unlock+the+bootloader+of+an+Android+Phone/152629#s317298
I get stuck on the step:
Enter the command adb reboot bootloader
Wait a couple seconds until your device rebooted into the bootloader, then enter the command fastboot flashing unlock
My phone isn't "rebooted into the bootloader", it just reboots. It gives the message "< waiting for any device >" when I write fastboot flashing unlock

jonas.sj said:
I'm trying to follow the steps here: https://www.ifixit.com/Guide/How+to+unlock+the+bootloader+of+an+Android+Phone/152629#s317298
I get stuck on the step:
Enter the command adb reboot bootloader
Wait a couple seconds until your device rebooted into the bootloader, then enter the command fastboot flashing unlock
My phone isn't "rebooted into the bootloader", it just reboots. It gives the message "< waiting for any device >" when I write fastboot flashing unlock
Click to expand...
Click to collapse
It should be a driver issue. When the phone is on and you connect it to the PC/laptop and send the command 'adb devices', does it show an alphanumeric value? Likewise, when you are booted into the bootloader by key combination and send the command, 'fastboot devices', does it show the same alphanumeric response? If so, the drivers are installed properly. If not, either you don't have the correct drivers or they are not installed properly. Try installing the drivers again after disabling driver signing in Windows on your PC (search for it on Google).

Hello, can you clarify what you mean by "booted into the bootloader by key combination"?
My problem is I cannot boot into bootloader at all.
Any attempt at doing so results in a normal boot of the device.

jonas.sj said:
Hello, can you clarify what you mean by "booted into the bootloader by key combination"?
My problem is I cannot boot into bootloader at all.
Any attempt at doing so results in a normal boot of the device.
Click to expand...
Click to collapse
Are you sure that the key combination for booting into bootloader is what you described in the first post?
1. Starting up phone while holding volume up and down buttons. Then select "reboot to bootloader".
Click to expand...
Click to collapse
I see Power plus Volume Up as the suggested one from a Google search. Try that.
If you can't even boot into the bootloader with the correct key combination, I don't know how to help you further since we are starting to go in circles. I am sorry.

Hello, thank you so much for trying to help me. It seems I can't boot into bootloader. Volume up + power gives the same result as what I did before.: It opens a "Recovery" menu where I can choose reboot to bootloader, but this option just reboots the phone.
I've been in contact with Kyocera and they say:
Thanks for contacting the Kyocera Customer Support. We will be more than happy to assist you with your concern
In this case allow us to inform you that since this device is a basic phone , it doesn't have the option to activate fastboot mode. By installing something that will change the way the phone works , that will void the warranty that came with the phone. We as manufacture can not help you to modify the software that came with the phone.
So the phone's fastboot mode has been deactivated. But since it's an android I guess it should still be possible with some workaround. I just don't know whee to start, I've been researching for a week with no result.

Something interesting ehre, maybe someone with more coding knowledge can tell what's going on.
I found the source code for the phone and located a file called recovery.c which I guess handles the menu I see when I press volume up + power button. Maybe some clue to why the phone isn't going into fastboot mode?