<![CDATA[OEM unlock problem]]>Dear friends,
I have LG Google Nexus 5 (Hammerhead D821(H) 32GB) model. Some days ago I tried to install Ubuntu Touch OS through UBports Software in my nexus 5 phone. But I forgot to enable USB Debugging first. So when I started the flash process and try to unlock bootloader, one time it show lock state unlocked. But In reality it was not unlocked. Because of this reason Ubuntu Touch OS installation is not completed and it corrupted my phone. Now I am unable to boot in android also. I also tried to re-flash my phone with Google Factory image but it was not completed because of my bootloader is locked. I don't know how i can unlock bootloader now. I used Wipe Data & Factory Reset option in Recovery Mode but it is also vain. I also used ADB sideload to install android os but again vain. Please help me how can I correct my phone and become again able to install Ubuntu Touch.

]]>https://forums.ubports.com/topic/4007/oem-unlock-problemRSS for NodeWed, 11 Mar 2026 22:00:17 GMTWed, 01 Apr 2020 10:58:38 GMT60<![CDATA[Reply to OEM unlock problem on Tue, 28 Apr 2020 17:50:21 GMT]]>Hi @shivmahar83 Do like this and see whats happens.

In the N5 factory folder there is this image-hammerhead-m4b30z.zip, extract it, in there you have another set of images.

right click an empty space in the folder, click 'Open terminal here', run these commands in terminal:

sudo fastboot oem unlock

sudo fastboot flash boot boot.img

sudo fastboot reboot-bootloader

sudo fastboot flash system system.img

sudo fastboot reboot-bootloader

sudo fastboot flash cache cache.img

sudo fastboot flasch recovery recovery.img

sudo fastboot reboot-bootloader

In bootloader run the Ubports installer

]]>https://forums.ubports.com/post/32270https://forums.ubports.com/post/32270Tue, 28 Apr 2020 17:50:21 GMT<![CDATA[Reply to OEM unlock problem on Mon, 27 Apr 2020 13:38:32 GMT]]>@shivmahar83 said in OEM unlock problem:

bootloader.

Reboot your phone to the bootloader.
Run the following command whilst in the bootloader

fastboot oem unlock

Then, on the phone, select the "unlock" option.
Now, boot back into the bootloader, and run ubports installer.

]]>https://forums.ubports.com/post/32225https://forums.ubports.com/post/32225Mon, 27 Apr 2020 13:38:32 GMT<![CDATA[Reply to OEM unlock problem on Mon, 27 Apr 2020 11:10:11 GMT]]>@Rondarius Dear Sir I tried it already. I downloaded the factory image from google developer website, unlock the bootloader, and run the command flash-all.sh but installation stopped because of bootloader unlock problem. Because in reality bootloader didn't unlocked it only show unlocked. If I restart the bootloader it again shows in locked state.

]]>https://forums.ubports.com/post/32223https://forums.ubports.com/post/32223Mon, 27 Apr 2020 11:10:11 GMT<![CDATA[Reply to OEM unlock problem on Sun, 26 Apr 2020 18:35:13 GMT]]>Hi @shivmahar83 download the factory img: https://developers.google.com/android/images#hammerhead extract the archive, in the folder, there is a file called flash-all.sh, run it and see whats happens when you have unlocked the phone.

]]>https://forums.ubports.com/post/32176https://forums.ubports.com/post/32176Sun, 26 Apr 2020 18:35:13 GMT<![CDATA[Reply to OEM unlock problem on Sat, 25 Apr 2020 15:02:08 GMT]]>@Rondarius Respected sir the above said factory image installation needs bootloader unlocked & my phones bootloader is locked and my phone is corrupted also. So I can't enable USB debugging and without USB debugging it is not possible to unlock bootloader.

]]>https://forums.ubports.com/post/32096https://forums.ubports.com/post/32096Sat, 25 Apr 2020 15:02:08 GMT<![CDATA[Reply to OEM unlock problem on Thu, 23 Apr 2020 18:21:36 GMT]]>@shivmahar83 Sorry for the late response. Try to reflash your phone to stock rom Android using this guide:
https://android.gadgethacks.com/how-to/complete-guide-flashing-factory-images-android-using-fastboot-0175277/
When you have installed the phone DO NOT REBOOT ANDROID use the Ubports installer instead while in bootloader.

]]>https://forums.ubports.com/post/31969https://forums.ubports.com/post/31969Thu, 23 Apr 2020 18:21:36 GMT<![CDATA[Reply to OEM unlock problem on Tue, 21 Apr 2020 09:55:40 GMT]]>@Rondarius The installation process stopped and below error shown through picture came.
IMG_1178.jpg

]]>https://forums.ubports.com/post/31805https://forums.ubports.com/post/31805Tue, 21 Apr 2020 09:55:40 GMT<![CDATA[Reply to OEM unlock problem on Sat, 18 Apr 2020 17:06:42 GMT]]>@Rondarius Good idea

]]>https://forums.ubports.com/post/31548https://forums.ubports.com/post/31548Sat, 18 Apr 2020 17:06:42 GMT<![CDATA[Reply to OEM unlock problem on Sat, 18 Apr 2020 16:46:26 GMT]]>@shivmahar83 When it is unlocked, what happens when you run the Ubports installer?

]]>https://forums.ubports.com/post/31545https://forums.ubports.com/post/31545Sat, 18 Apr 2020 16:46:26 GMT<![CDATA[Reply to OEM unlock problem on Sat, 18 Apr 2020 12:46:26 GMT]]>@Lakotaubp I also used it. One its show unlocked but after rebooting bootloader its again locked.IMG_1144.jpg IMG_1140.jpg

]]>https://forums.ubports.com/post/31526https://forums.ubports.com/post/31526Sat, 18 Apr 2020 12:46:26 GMT<![CDATA[Reply to OEM unlock problem on Sat, 18 Apr 2020 10:23:17 GMT]]>@shivmahar83 Try sudo fastboot oem unlock then sudo fastboot reboot bootloader.

]]>https://forums.ubports.com/post/31511https://forums.ubports.com/post/31511Sat, 18 Apr 2020 10:23:17 GMT<![CDATA[Reply to OEM unlock problem on Sat, 18 Apr 2020 10:00:58 GMT]]>if I use sudo adb sideload command this errors showIMG_1142.jpg

]]>https://forums.ubports.com/post/31509https://forums.ubports.com/post/31509Sat, 18 Apr 2020 10:00:58 GMT<![CDATA[Reply to OEM unlock problem on Sat, 18 Apr 2020 08:19:23 GMT]]>@Lakotaubp I did it. its unlock bootloader but when I reboot bootloader its again show state locked.

]]>https://forums.ubports.com/post/31503https://forums.ubports.com/post/31503Sat, 18 Apr 2020 08:19:23 GMT<![CDATA[Reply to OEM unlock problem on Thu, 02 Apr 2020 12:33:44 GMT]]>@shivmahar83 Right good. Then run sudo fastboot OEM unlock then sudo fastboot reboot bootloader and ses what happens

]]>https://forums.ubports.com/post/30506https://forums.ubports.com/post/30506Thu, 02 Apr 2020 12:33:44 GMT<![CDATA[Reply to OEM unlock problem on Thu, 02 Apr 2020 10:41:26 GMT]]>@Lakotaubp Yes "sudo fastboot devices" command show the fastboot device is connected to my ubuntu pc.

]]>https://forums.ubports.com/post/30493https://forums.ubports.com/post/30493Thu, 02 Apr 2020 10:41:26 GMT<![CDATA[Reply to OEM unlock problem on Thu, 02 Apr 2020 10:26:32 GMT]]>@stanwood Dear sir I try many times "sudo fastboot oem unlock" command in my Ubuntu PC but one time its show unlocked but again it shows unlocked after rebooting bootloader.

]]>https://forums.ubports.com/post/30492https://forums.ubports.com/post/30492Thu, 02 Apr 2020 10:26:32 GMT<![CDATA[Reply to OEM unlock problem on Thu, 02 Apr 2020 10:20:16 GMT]]>@shivmahar83 can you please try just fastboot devices and let us know the result. The more info we have the easier it is to help.

]]>https://forums.ubports.com/post/30490https://forums.ubports.com/post/30490Thu, 02 Apr 2020 10:20:16 GMT<![CDATA[Reply to OEM unlock problem on Thu, 02 Apr 2020 10:17:58 GMT]]>@joe Dear sir I try many times "sudo fastboot oem unlock" command in my Ubuntu PC but one time its show unlocked but again it shows unlocked after rebooting bootloader.

]]>https://forums.ubports.com/post/30489https://forums.ubports.com/post/30489Thu, 02 Apr 2020 10:17:58 GMT<![CDATA[Reply to OEM unlock problem on Thu, 02 Apr 2020 06:23:03 GMT]]>Just for more info what was on the device before you started. Stock android or something else? Is there a chance the partition sizes have been altered. That will stop UT installation. As Flohack said something is off in some way. I know you have tried before but does - fasboot devices - show your device when run.

]]>https://forums.ubports.com/post/30482https://forums.ubports.com/post/30482Thu, 02 Apr 2020 06:23:03 GMT<![CDATA[Reply to OEM unlock problem on Thu, 02 Apr 2020 06:12:53 GMT]]>@shivmahar83 There must be something wrong with your description, if you did not unlock your bootloader then it cannot show unlocked.

Anyways, you can always go to fastboot mode, unlock the bootloader and re-install the Google factory image or continue from there with the UBports installer. It is virtually impossible to brick a Nexus 5...

]]>https://forums.ubports.com/post/30481https://forums.ubports.com/post/30481Thu, 02 Apr 2020 06:12:53 GMT<![CDATA[Reply to OEM unlock problem on Wed, 01 Apr 2020 18:29:01 GMT]]>@stanwood said in OEM unlock problem:

@joe Did you try the following command in your terminal? : "sudo fastboot oem unlock" 1rst of all be sure you've got fastboot package installed (sudo apt install fastboot) and adb (sudo apt install adb).

@shivmahar83

]]>https://forums.ubports.com/post/30461https://forums.ubports.com/post/30461Wed, 01 Apr 2020 18:29:01 GMT<![CDATA[Reply to OEM unlock problem on Wed, 01 Apr 2020 18:26:47 GMT]]>@joe Did you try the following command in your terminal? : "sudo fastboot oem unlock" 1rst of all be sure you've got fastboot package installed (sudo apt install fastboot) and adb (sudo apt install adb).

]]>https://forums.ubports.com/post/30460https://forums.ubports.com/post/30460Wed, 01 Apr 2020 18:26:47 GMT<![CDATA[Reply to OEM unlock problem on Wed, 01 Apr 2020 18:04:22 GMT]]>@shivmahar83
According to this, fastboot commands should still work even if usb debugging is off:
https://forum.xda-developers.com/google-nexus-5/help/unlocking-bootloader-usb-debugging-t3761785

Which computer OS are you using?

]]>https://forums.ubports.com/post/30458https://forums.ubports.com/post/30458Wed, 01 Apr 2020 18:04:22 GMT<![CDATA[Reply to OEM unlock problem on Wed, 01 Apr 2020 13:34:20 GMT]]>I tried it. But OEM is not unlocking because I didn't on USB Debugging as I said in my post.

]]>https://forums.ubports.com/post/30438https://forums.ubports.com/post/30438Wed, 01 Apr 2020 13:34:20 GMT