Okay, now I know the topic is a bit vague but I couldn't come up with any other name.
I just got a phone (QMobile s2) and I want to factory reset it because I don't know the pin code, simple enough right?
But here's the problem, when I boot into recovery it says "No command". So I tried the following:
1. I connected it to a pc and tried doing a reset from adb (adb shell wipe data) I get " Error opendir'ing /data 'Permission denied' " (same happens with root)
2. I get into fastboot and use "fastboot -w", "fastboot format cache", "fastboot format userdata" all give the error " FAILED (remote: unknown command) "
3. Then i read that I have to use "fastboot oem unlock" before the above commands, I get a prompt on the phone but the volume keys don't work and I get " FAILED (remote:Unlock operation is not allowed)"
And now I got nothing... any help would be appreciated.
I too Got That When I boot To recovery on my Old note 3.
Good for me Holding power Button for 2s Solved That.
Sent from my Nexus 6P using Tapatalk
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I have 32GB WIFI, Nexus 9 bought from Amazon which unfortunately has got stuck in boot loop after updating to 5.0.2 (LRX22L) released on air . My device is locked and it doesn't give permission to use "fastboot oem unlock" command thus I can't flash factory image because it says device is locked. I've tried Factory reset from fastboot mode and also from Recovery menu (wipe cache partition and wipe data/factory reset) and it still has the problem. That's worthy to note that PC recognizes device with "fastboot devices" command but it doesn't recognize using command "adb devices".
my PC's OS is 64bit windows 8.1
Then I tried using "Apply update from ADB" in recovery menu and sideload which gave me E: footer is wrong and signature is unspecified but in this mode command window in platform-tools path recognizes device as "adb device" command used.
The other thing I tried was unlocking the device using adb shell (and so on) and it says :closed
I'd be grateful if you folks, helped me with your solutions.
npa2194 said:
I have 32GB WIFI, Nexus 9 bought from Amazon which unfortunately has got stuck in boot loop after updating to 5.0.2 (LRX22L) released on air . My device is locked and it doesn't give permission to use "fastboot oem unlock" command thus I can't flash factory image because it says device is locked. I've tried Factory reset from fastboot mode and also from Recovery menu (wipe cache partition and wipe data/factory reset) and it still has the problem. That's worthy to note that PC recognizes device with "fastboot devices" command but it doesn't recognize using command "adb devices".
my PC's OS is 64bit windows 8.1
Then I tried using "Apply update from ADB" in recovery menu and sideload which gave me E: footer is wrong and signature is unspecified but in this mode command window in platform-tools path recognizes device as "adb device" command used.
The other thing I tried was unlocking the device using adb shell (and so on) and it says :closed
I'd be grateful if you folks, helped me with your solutions.
Click to expand...
Click to collapse
You only have one solution: return it to Amazon for replacement.
cam30era said:
You only have one solution: return it to Amazon for replacement.
Click to expand...
Click to collapse
You mean there is no other way for rooting or unlocking Nexus9 ? any program, application , command etc?
npa2194 said:
You mean there is no other way for rooting or unlocking Nexus9 ? any program, application , command etc?
Click to expand...
Click to collapse
Correct. No way if your bootloader is locked.
Hello
I have a problem when I want to unlock my nexus 9.
First I have a problem because my tablet freezed.
I have made a factory reset, then google said me : used the first account to use your tablet" but I lost this account
So I want to flash my tablet.
to do that, I use the tutorial on HTC site. on step 5 they say:
type adb oem unlock
but the CMD windows just say:
<waiting for device>
then I try to show devices with adb device but my window don't show device.
to do those step my tablet was in recovery more "fastboot usb"
can you help me?
thanks
Jack
@jackvig Looks like you encountered Factory Reset Protection!
You can not use adb commands while in fastboot mode! "fastboot devices" should list your device.
And the command to unlock is "fastboot oem unlock" not adb!
Plus you won't be able to unlock the bootloader unless you have selected the option to do so in developer options, since you have factory reset that option may have been turned off even if you set it previously.
Your going to have to try and remember your account password to make the device usable.
Depending on what version/patch of the rom your device is on it maybe possible to Bypass FRP, google it.
If your device was on a very recent patch level, no bypass trick will work.
corkiejp said:
@jackvig Looks like you encountered Factory Reset Protection!
You can not use adb commands while in fastboot mode! "fastboot devices" should list your device.
And the command to unlock is "fastboot oem unlock" not adb!
Plus you won't be able to unlock the bootloader unless you have selected the option to do so in developer options, since you have factory reset that option may have been turned off even if you set it previously.
Your going to have to try and remember your account password to make the device usable.
Depending on what version/patch of the rom your device is on it maybe possible to Bypass FRP, google it.
If your device was on a very recent patch level, no bypass trick will work.
Click to expand...
Click to collapse
thanks @corkiejp for your reply
I agree with you for fastboot instead of adb but the result is the same.
I cannot go inside the tablet to change parameters
Some forum said that I can Unlock in recovery mode
Is it true?
when my tablet is in recovery mode (On/off + Vol Up)
the tablet show me device state : locked
I am in state HBOOT
the on my computer I do that
C:\Users\maison>fastboot oem unlock
...
(bootloader) ability is 0
(bootloader) Permission denied for this command!
OKAY [ 0.015s]
finished. total time: 0.018s
after I go in FASTBOOT mode then :
C:\Users\maison>fastboot oem unlock
< waiting for device >
what can I do to have the Key to unlock
No you need fastboot mode to unlock the bootloader!
Is the command "fastboot devices" listing your device. If not check your drivers for your device.
C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot devices
HT4B6JT00881 fastboot
after that i try :
C:\Program Files (x86)\Minimal ADB and Fastboot>adb sideload volantis-ota-n9f27m-ad1aee0f.zip
loading: 'volantis-ota-n9f27m-ad1aee0f.zip'adb server is out of date. killing...
* daemon started successfully *
serving: 'volantis-ota-n9f27m-ad1aee0f.zip' (~0%) * failed to read command: Invalid argument
i think tablet i now connected to computer
C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot oem unlock
...
(bootloader) ability is 0
(bootloader) Permission denied for this command!
OKAY [ 0.011s]
finished. total time: 0.014s
As suspected the option to unlock is not selected in developer options.
If your successful in sideloading an OTA image in recovery mode (not fastboot mode), you will still encounter FRP on booting the device.
Edit: - As said before ADB commands do not work in fastboot mode. And fastboot commands do not work in Recovery mode!
As said before your only hope is to remember your account and password used (or the very last account you used on the device might work).
If you haven't updated the rom in the last year, you maybe able to use FRP Bypass trick.
jackvig said:
Hello
I have a problem when I want to unlock my nexus 9.
First I have a problem because my tablet freezed.
I have made a factory reset, then google said me : used the first account to use your tablet" but I lost this account
So I want to flash my tablet.
to do that, I use the tutorial on HTC site. on step 5 they say:
type adb oem unlock
but the CMD windows just say:
<waiting for device>
then I try to show devices with adb device but my window don't show device.
to do those step my tablet was in recovery more "fastboot usb"
can you help me?
thanks
Jack
Click to expand...
Click to collapse
You should not have factory reset if you do not know the account password. It is protected by "factory reset protection". To prevent it from being used if it is stolen. You are most likely going to need the password for the account that was logged in when you reset.
Flashing is not going to help. And as mentioned previously, you cannot unlock the bootloader now since you cannot go into developer options and turn on oem unlocking.
Hi all,
How can I wipe the cache partition on a Poco F1 with 10.3.6.0 Global stable (stock, so not rooted)? Booting in recovery mode gives me a custom recovery with only the option to wipe all data. Can Mi Assistant help here? Or are there other options?
Google would have helped you... Reboot to recovery and try 'fastboot erase cache'. Sometimes you need a 'sudo su' before that.
guhvanoh said:
Google would have helped you... Reboot to recovery and try 'fastboot erase cache'. Sometimes you need a 'sudo su' before that.
Click to expand...
Click to collapse
Well, as I said: I have stock ROM. As far as I see I do not have any option to erase system cache in the default recovery.
As I said as well: I have stock firmware, perhaps should have added locked bootloader. So no possibility to use fastboot (again, correct me if I'm wrong).
If the only option is to unlock the bootloader I can just replace recovery with TWRP, but I'd like to avoid having to unlock...
Hi there,
First enable USB debugging in the developer options. To enable developer options, you have to tap five times on the miui version in the about phone. Connect your PC and accept the pop up in your phone to register the pc in your phone. Power off your phone first and press power button and volume down simultaneously to take you to fastboot mode. If it goes to bootloader mode, then select the option to go to fastboot mode. If the bootloader mode is in Chinese then search some forums to select the fastboot mode appropriately.
Before all these. Install minimum ADB tools in your PC. Execute fastboot commands once connected to your phone in fastboot mode.
This is very simple once you are familiar with the process. Until then these seems a nightmare'.
Cheers
sssyraj
Hit thanks if it helps you.
And just to add to the above instructions, you don't need an unlocked bootloader, just have USB debugging enabled, to use fastboot.
You use fastboot to unlock the bootloader and it would be a mite hard (and redundant) if you needed the bootloader unlocked to unlock the bootloader...
Also, just to confirm the phone is being detected in fastboot mode use the command "fastboot devices" to see if the phone is recognised.. It should show a number otherwise if it is just a blank space fastboot hasn't recognised your phone...
ultramag69 said:
And just to add to the above instructions, you don't need an unlocked bootloader, just have USB debugging enabled, to use fastboot.
You use fastboot to unlock the bootloader and it would be a mite hard (and redundant) if you needed the bootloader unlocked to unlock the bootloader...
Also, just to confirm the phone is being detected in fastboot mode use the command "fastboot devices" to see if the phone is recognised.. It should show a number otherwise if it is just a blank space fastboot hasn't recognised your phone...
Click to expand...
Click to collapse
Got it into fastboot, but now it throws an error. Google search did not give a real solution.
Error shown:
Code:
******** Did you mean to fastboot format this ext4 partition?
erasing 'cache'...
FAILED (remote: Erase is not allowed in Lock State)
finished. total time: 0.007s
jvdv360 said:
Got it into fastboot, but now it throws an error. Google search did not give a real solution.
Error shown:
Click to expand...
Click to collapse
With that error shown I'm not sure what formatting will do. If the current type is ext4, then you should be fine. But it is looking like you're a candidate for unlocking your bootloader...
We bought a used / refurbished tablet, but got 2 of them. The seller said it's okay and doesn't want it back. One tablet works, one tablet is factory resetted and locked with a PIN.
Alternatively I can unlock it with the last used google account. I neither have PIN nor google account.
Is it still possible to use the tablet or is it just an high tech paperweight?
I can boot into FFBM mode (Power + Volume Up)
pretty empty here
I can boot into fastboot mode (Power + Volume Down)
The tablet gets recognized by my laptop.
I tried "fastboot erase data", but got the error "remote: device is locked. Cannot erase."
I tried "fastboot oem unlock", but got the error "remote: unknown command"
I can boot into Android recovery (Power + Volume Up + Volume Down)
I selected "Wipe data/factory reset" and "Wipe cache partition".
After reboot it's still asking for the last used PIN or the last used google account.
The tablet is a Lenovo M10. Seems like I can't get a connection over "adb shell" at all "no devices/emulators found".
Maybe anyone of you has an idea.
@arv_
Your problem is that tablet is FRP locked. This lock can't get sinply removed by means of any method selectable in Android's recovery or ADB and/or Fastboot.
Try Lenovo FRP Remove Tool.
FYI:
I tried "fastboot erase data", but got the error "remote: device is locked. Cannot erase."
Click to expand...
Click to collapse
Indicates that tablet's bootloader is locked.
I tried "fastboot oem unlock", but got the error "remote: unknown command"
Click to expand...
Click to collapse
Says the "oem unlock" subcommand isn't a valid one. Try "fastboot flashing unlock" instead.
I can't get a connection over "adb shell" at all "no devices/emulators found".
Click to expand...
Click to collapse
Tells you that you haven't established an ADB connection yet. Try "adb devices" instead.
jwoegerbauer said:
Try Lenovo FRP Remove Tool.
Click to expand...
Click to collapse
This does not work.
jwoegerbauer said:
Says the "oem unlock" subcommand isn't a valid one. Try "fastboot flashing unlock" instead.
Click to expand...
Click to collapse
This works, but says "remote: oem unlock is not allowed"
But FRP Remove seems like what I am looking for. And seems like Lenovo / Android are trying to prevent this.
Hello I am trying to boot my phone to recovery mode to do a factory reset since it keeps restarting and it does not passes the Logo screen, it is stuck on a looping state. I tried to access the recovery mode usign the volume buttons but is not working, it keeps restarting. I did not enable debugging usb since I never knew I was going to need it. Any help will be greatly appreciated.
lol easy.
if your has problem, can you boot your phone into fastboot, don't request usb debbuging.
install this file and unzip it on your pc. https://dl.google.com/android/repository/platform-tools-latest-windows.zip
now open this folder and open cmd window inside it.
and run this command "fastboot continue" for continue normal booting.
if you need to reset your phone, can you use this command "fastboot -w"
Thanks,
I've tried that but is says command not allow.
C:\adb\platform-tools>fastboot continue
Resuming boot FAILED (remote: 'Command not allowed')
fastboot: error: Command failed
Then I tried fastboot reboot to fastboot and it gave me this
C:\Users\Aiven>fastboot reboot fastboot
Rebooting into fastboot OKAY [ 0.001s]
< waiting for any device >
fastboot: error: Failed to boot into userspace fastboot; one or more components might be unbootable.
it goes back to the looping stage again.