• Introducing XDA Computing: Discussion zones for Hardware, Software, and more!    Check it out!

[GUIDE] Unlock/Root/Flash for Nexus 5X

Search This thread

azertguigui

Senior Member
Dec 23, 2012
229
199
I'm on stock rom 7.0, unlocked bootloader and root, can I follow the section 9 of your tutorial to switch to Android 7.1.1 without wiping my data ?
I've heard reports of failure while attempting such procedure (due to a LG hardware problem) ?

Thank you for you good work, keep it up :)
 

ulxerker

Senior Member
Jul 6, 2015
4,143
1,084
Google Pixel 5
I'm on stock rom 7.0, unlocked bootloader and root, can I follow the section 9 of your tutorial to switch to Android 7.1.1 without wiping my data ?
I've heard reports of failure while attempting such procedure (due to a LG hardware problem) ?

Thank you for you good work, keep it up :)

yep, just go ahead. the problem you've heard of is a rare hardware issue.
 

Captain_Hungary

Senior Member
Nov 14, 2013
231
132
Budapest
Hello guys, I have a problem in istalling twrp recovery. I have successfully unlocked my bootloader, but when I try to flash twrp, it gives me this error: "neither -p product specified, nor ANDROID_PRODUCT_OUT SET." Btw im on 7.1.1. Same happens with last 3 images.
Does anyone know how to solve it?
 

SlimSnoopOS

Senior Member
Jan 29, 2011
8,052
3,348
Hello guys, I have a problem in istalling twrp recovery. I have successfully unlocked my bootloader, but when I try to flash twrp, it gives me this error: "neither -p product specified, nor ANDROID_PRODUCT_OUT SET." Btw im on 7.1.1. Same happens with last 3 images.
Does anyone know how to solve it?
Show me the screenshot of:

Code:
fastboot flash recovery nameoftwrp.img

Sent from my Nexus 5X using Tapatalk
 
  • Like
Reactions: Captain_Hungary

ac21365

Senior Member
Jul 1, 2009
74
19
DFW
You can if you want. I am already using NMF26F with SuperSU 2.78 SR5 and EX kernel. Used section 9 to update from 7.1.1 developer preview 2. Of course it'll work the same updating from 7.0.

Hello all, just wanted to add another data point over here in the Nexus 5x section. I wanted to use Network Signal Guru but needed root, my phone needed a wipe anyway, so I waited a few weeks for 7.1 to drop so I could knock out 3 birds with one wipe.

For starters:
- Was on stock 7.0 non rooted.
- Manually flashed stock 7.1.1 NMF26F & relocked the bootloader (clean start).

Turns out, you can root and keep encryption with Android N, so I then followed these steps using TWRP 3.0.2-2 and SuperSU 2.78 flashable zip:
1. You have to unlock the bootloader, which wipes your data.
2. You have to choose wether you want to be encrypted or not, if you do not want an encrypted device you can follow the other guide in the topics list.
3. If you do choose to go encryped, boot once, setup your pass/pin
4. Reboot back to bootloader, install TWRP
5. Boot to Recovery (twrp), input your pass/pin setup on step 3
6. flash SU via TWRP.

This worked like a charm on my 5x. Rooted stock N with encryption still in tact on 7.1.1 NMF26F. In my experience, step 5 never asked me for the pin I set up in step 3, but it shows encrypted in the OS nonetheless. The only root app I've tried so far is Network Signal Guru, but it works with root as expected (awesome app for you cellular network nerds, by the way!). I haven't tried xposed framework or anything like that, yet, but I presume it will work just fine as well.

Hope this helps!
 

juliusrandleisaman

New member
Apr 13, 2014
4
0
So I have been having issues rooting since 7.0 came out. I used to be rooted on MM and after I installed 7.0 I was never been able to root again. This is the message I get when installing the SuperSU 2.79 zip via TWRP (3.0.2-2).
Boot image patcher
****************
- Finding boot image
--- Boot image: /dev/clock/mmcblk0p34
- Extracting ramdisk
- Decompressing ramdisk
- Checking patch status
- Creating backup
- Patching sepolicy
--- Failure, aborting
Any idea why this happens? I've tried different versions of SuperSU and still no success.
 

SlimSnoopOS

Senior Member
Jan 29, 2011
8,052
3,348
So I have been having issues rooting since 7.0 came out. I used to be rooted on MM and after I installed 7.0 I was never been able to root again. This is the message I get when installing the SuperSU 2.79 zip via TWRP (3.0.2-2).

Any idea why this happens? I've tried different versions of SuperSU and still no success.

I prefer to use the SuperSU betas and haven't had any trouble rooting. I'm currently using 7.1.1 NMF26F and SuperSU 2.78 SR5. Download this from my link to the beta SuperSU, fastboot flash boot and system that matches your OS, then boot into TWRP and install SR5.

Sent from my Nexus 5X using Tapatalk
 
  • Like
Reactions: juliusrandleisaman

khanjui

Senior Member
Dec 1, 2012
1,461
754
22
Eskisehir
500px.com
I prefer to use the SuperSU betas and haven't had any trouble rooting. I'm currently using 7.1.1 NMF26F and SuperSU 2.78 SR5. Download this from my link to the beta SuperSU, fastboot flash boot and system that matches your OS, then boot into TWRP and install SR5.
SuperSU 2.79 is newer than 2.78 SR5. And I haven't got any problems with it. The problem is probably because of old TWRP version.

Extract the boot.img from your ROM zip and flash it as boot from TWRP (I prefer using latest TWRP from jollaman999). Then flash the SuperSU zip, it should work.

Sent from my LG Nexus 5X using XDA Labs
 
  • Like
Reactions: juliusrandleisaman

juliusrandleisaman

New member
Apr 13, 2014
4
0
SuperSU 2.79 is newer than 2.78 SR5. And I haven't got any problems with it. The problem is probably because of old TWRP version.

Extract the boot.img from your ROM zip and flash it as boot from TWRP (I prefer using latest TWRP from jollaman999). Then flash the SuperSU zip, it should work.

Sent from my LG Nexus 5X using XDA Labs
I'll try it. Thanks for all of yall's help and suggestions.

EDIT:
I feel like an idiot. I went back and flashed all the stock images and SuperSU finally installed afterwards! Thanks for all of the help. Root access gained.
 
Last edited:

aidandj

Member
Mar 9, 2008
30
2
I also posted this in the general help but I used method 9 last night to update to 7.1.1 and had some issues.

Rebooted into recovery, and pulled/edited/pushed my build.prop file. Then when I went to reboot i got stuck in a boot loop.

I have tried it twice now, with no change. To be clear, in the bootloop i can flash back to factory and everything works, so I don't think I have a hardware issue.

Any other experiences?

---------- Post added at 07:28 PM ---------- Previous post was at 06:36 PM ----------

Update: Got it to work

I manually edited the build.prop in adb shell while in recovery mode. Changed the time stamps back to match the old build.prop.

Then booted into the system. Seems to be working so far.
 
Last edited:
  • Like
Reactions: SlimSnoopOS

itsdjc

New member
Dec 16, 2016
1
0
Hello.

Today approximately 10 hours ago, while refreshing my facebook app, my Nexus 5x froze and rebooted. For 3-4 hours I attempted to get it to boot and it would display 'Google' for about 5-10 seconds then turn off. I am able to get in to fastboot mode; however, entering recovery mode only works about 1 out of 10 times.

A co-worker of mine pointed me to this forum to possibly reload factory image onto the phone. However, it seems a key component in doing so is unlocking the bootloader, which requires turning on dev tools in the phone settings. For reasons stated above, I am unable to do this.

Are there any other options for me?
Thanks,

Dan
 

Top Liked Posts

  • There are no posts matching your filters.
  • 262
    [SIZE=+3]Heisenberg's How-To Guide For Beginners[/SIZE]
    [SIZE=+2]Nexus 5X[/SIZE]
    GLoF1eq.jpg

    [SIZE=+1]Intro[/SIZE]

    This thread will serve as a location for basic how-to guides for the Nexus 5X. I'm going to start off with a couple of the more obvious ones and go from there. If anyone has any suggestions for additions please feel free to let me know.

    If you're unsure about something please read the FAQ section in post #2 before creating a post to ask a question.

    [size=+1]Prerequisites[/size]:

    You'll need a working adb/fastboot environment on your PC to get through some of these guides. Below are two options for install.

    Please do not install adb/fastboot via any means other than the Android SDK, using other tools (like Minimal adb & fastboot) can lead to an outdated setup and various problems with flashing. You've been warned, other tools will not be supported in this thread.

    Option A
    Google hosts ADB/Fastboot (platform-tools) for Windows, OSX, and Linux. This is a minimal download, in contrast to Option 2. These links and file sizes may be updated periodically by Google. If using Windows, download the Google USB Driver and follow the driver install instructions. Once you have downloaded the platform-tools zip, extract the file then transfer the platform-tools folder to your desktop. The platform-tools folder contains adb, fastboot, and several other files. Note that clicking any link for platform-tools will immediately start a download.

    *Windows: platform-tools. Google USB Driver install.
    *OSX: platform-tools. For additional details on how to use OSX and adb/fastboot commands, see post #3.
    *Linux: platform-tools.

    See Option B below for old method to install adb/fastboot:

    Option B
    Go here to download the Android SDK, which will give you most updated version of adb and fastboot. Scroll to the bottom of the page and find Other Download Options>SDK Tools Only, and grab the right version for your OS. While it's downloading create a folder in C:\ called SDK (C:\SDK). Once you've downloaded the zip you can extract it into your C:\SDK folder. Navigate to C:\SDK\android-sdk-windows and open SDK Manager.exe. In SDK Manager you need to install the following packages:

    Tools> Android SDK Tools, Android SDK Platform-tools
    Extras> Android Support Repository, Google USB Driver

    Once you have installed those, inside C:\SDK you should see some new folders, one of them will be called platform-tools, within that folder you should see fastboot.exe and adb.exe. I'll refer to this as your fastboot folder/directory or working folder/directory during this guide.


    For Option A and B, make sure adb is correctly installed. Open a command prompt from within your fastboot folder (hold shift + right click, select open command prompt here) and issue this command:
    Code:
    adb version

    If it returns a version number for Android Debug Bridge then you're good to go.

    You can test adb by connecting your device to your PC while booted into Android (making sure that adb/usb debugging is enabled in Settings>Developer Options) with the screen unlocked and issuing this command:
    Code:
    adb devices
    It should return your device serial number, if so, adb is working.

    You can test fastboot by connecting your device to your PC while booted into the bootloader (power + volume down) and issuing this command:
    Code:
    fastboot devices
    It should return your device serial number, if so, fastboot is working.

    By attempting any of the processes listed this thread you accept full responsibility for your actions. I will not be held responsible if your device stops working, catches on fire, or turns into a hipster and claims to have been modified before it was cool.

    z7e6jQa.jpg

    [SIZE=+1]Quick Tips[/SIZE]

    How to boot into the bootloader:
    Power off your device. Once it's powered off hold power + volume down and the phone will boot into the bootloader. You can also use the following adb command:
    Code:
    adb reboot bootloader
    You can also use an app called Quick Boot to boot into the bootloader directly from Android (root required).

    How to boot into recovery:
    Boot into the bootloader (see above), use the volume keys to scroll through the options and use the power button to select the recovery mode option. You can also use the following adb command:
    Code:
    adb reboot recovery
    You can also use an app called Quick Boot to boot into the recovery directly from Android (root required).

    z7e6jQa.jpg

    [SIZE=+1]Index[/SIZE]

    1. How To Unlock Your Bootloader
    2. How To Install A Custom Recovery On Your Device
    3. How To Decrypt Your Data Partition
    4. How To Make A Nandroid Backup With TWRP Recovery
    5. How To Make An EFS Backup With TWRP Recovery
    6. How To Root
    7. How To Install A ROM with TWRP Recovery
    8. How To Install A Custom Kernel With TWRP Recovery
    9. How To Update To A New Build Of The Stock ROM
    10. How To Flash The Factory Images (Return To Stock)
    11. How To Flash The Factory Images (Return To Stock But Leaving Internal Storage Intact)
    FAQ can be found in post #2!

    z7e6jQa.jpg

    [SIZE=+1]1. How To Unlock Your Bootloader[/SIZE]

    • Go into Settings/About Phone, scroll down and click on ?build number? continuously until you see a toast notification telling you that you've enabled Developer Options. Go back to your Settings menu and enter Developer Options, scroll down and click on the ?Enable OEM Unlock? checkbox, also make sure you enable USB Debugging while you're in the Developer Options menu.
    • Power off your phone then boot into the bootloader (power + volume down).
    • Connect your phone to your PC via usb cable.
    • Open a command prompt from within your fastboot folder (navigate to where you have fastboot.exe located on your PC, shift + right click anywhere within that folder, select open command prompt here).
    • Check your fastboot connection by issuing this command:

      Code:
      fastboot devices

      It should return your device serial number, if not you need to make sure your drivers are installed correctly.​
    • Once you've confirmed your fastboot connection issue this command:

      Code:
      fastboot oem unlock
      This will erase all user data from the device!
    • You should now see a screen on your phone asking you to confirm this action, use the volume keys to scroll and the power key to confirm if you're sure you want to go ahead.
    • Allow the process to complete and then issue this command:

      Code:
      fastboot reboot
    • Allow everything to go ahead and once finished you can disconnect your usb cable.

    Important: do not relock your bootloader unless your phone is fully stock. You must flash the factory images first in order to remove root and custom recovery (if you have them), if this precaution isn't taken you may end up with a brick. Please see section 10 of this guide for full instructions on how to return to stock.

    z7e6jQa.jpg

    [SIZE=+1]2. How To Install A Custom Recovery On Your Device[/SIZE]

    Prerequisites: unlocked bootloader (section 1). Please read FAQ #7 if using TWRP 3.0.2-1 or 3.0.2-2.

    • Download TWRP Recovery onto your PC.
    • Make sure you check the md5 to verify its integrity (where possible).
    • Place the file in your fastboot folder (this is where fastboot.exe is located on your PC).
    • Power off your phone then boot into the bootloader (power + volume down).
    • Open a command prompt from within your fastboot folder (navigate to where you have fastboot.exe located on your PC, shift + right click anywhere within that folder, select open command prompt here), enter this command:

      Code:
      fastboot flash recovery filename.img

      (The recovery filename in the command will change depending on which recovery you're flashing)
    • Use the volume keys to scroll and power key to select the Reboot Bootloader option. Once the phone has booted back into the bootloader, use the volume keys to scroll and the power key to boot into your newly flashed recovery. It's now safe to disconnect your usb cable. If using Nougat 7.0 or newer, you must now boot directly into TWRP and flash SuperSU (or your preferred root alternative) so that TWRP will persist between reboots.
    When TWRP boots up you'll be asked whether you want to allow system modifications or to keep it read-only, choose to allow system modifications, there's no benefit to keeping it read-only.

    Do not flash the version of SuperSU that TWRP offers to flash for you in order to give you root, it is not compatible and will cause problems. When you attempt to reboot out of TWRP it will tell you that it's detecting that you don't have root and it will offer to root for you, skip past this.


    Some users need a custom recovery for a temporary period, so they live boot the recovery. In this scenario, the custom recovery replaces the stock recovery until a reboot is performed. Place the file in your fastboot folder then enter this command:

    Code:
    fastboot boot filename.img

    (The recovery filename in the command will change depending on which recovery you're flashing)

    z7e6jQa.jpg

    [SIZE=+1]3. How To Decrypt Your Data Partition[/SIZE]

    This is no longer necessary as long as you use TWRP 2.8.7.1 or newer

    Prerequisites: unlocked bootloader (section 1).

    TWRP recovery cannot decrypt your data partition at this stage. In order for TWRP to be able to read/write on your data partition (to root or create a nandroid backup) you will need to format it, a format will remove encryption.

    • Boot into the bootloader and connect your phone to your PC via usb cable.
    • Open a command prompt from within your fastboot folder (navigate to where you have fastboot.exe located on your PC, shift + right click anywhere within that folder, select open command prompt here), enter this command:
      Code:
      fastboot format userdata
      Please note: this will erase all user data from the device!
    • Once the process has completed you can either reboot normally:
      Code:
      fastboot reboot
      Or you can reboot back to the bootloader in order to undertake another task:
      Code:
      fastboot reboot-bootloader

    z7e6jQa.jpg

    [SIZE=+1]4. How To Make A Nandroid Backup With TWRP Recovery[/SIZE]

    Prerequisites: unlocked bootloader (section 1), TWRP recovery (section 2).

    A nandroid backup is a very important thing to have before installing any custom software on your device. It's basically a backup of your stock system that you can fall back on if anything goes wrong or if you just want your stock ROM back. You can also use the backup tool to create a backup of your favourite ROM set up exactly the way you like it. The backup you create can be easily restored using the restore tool in TWRP recovery.

    Boot TWRP recovery, select the backup option from the TWRP home screen, check the system/data/boot boxes, and swipe to backup. The process will take a few minutes.

    z7e6jQa.jpg

    [SIZE=+1]5. How To Make An EFS Backup With TWRP Recovery[/SIZE]

    An EFS backup is very important to have, if your EFS partition becomes corrupt you will have no IMEI, and therefore will not be able to use the phone as a phone. Making an EFS backup is insurance against this catastrophic event. Without a backup, restoring your EFS can be extremely difficult or impossible. The backup you create can be easily restored using the restore tool in TWRP recovery.

    Please read FAQ #7 if using TWRP 3.0.2-1 or 3.0.2-2. Boot into TWRP and select the backup option from the TWRP home screen, make sure only the EFS box is selected, and swipe to backup. The process will take a few seconds. Keep a copy of the backup on your phone and also keep another copy somewhere safe.

    z7e6jQa.jpg

    [SIZE=+1]6. How To Root[/SIZE]

    Prerequisites: unlocked bootloader (section 1), TWRP recovery (section 2).

    • Download the latest root method of your choosing to your phone:
      Magisk
      SuperSU Stable
      SuperSU Service Release (SuperSU beta channel)
      Or to root Android Nougat 7.0 visit this thread: Use SuperSU 2.78 or newer.
      [WIP] Android N Preview
    • Boot into TWRP recovery and enter the install menu.
    • Navigate to where you have SuperSU stored on your internal storage and select it.
    • Swipe to install.
    • Once you've installed SuperSU you'll have an option to wipe cache/dalvik and an option to reboot system. Wipe the cache/dalvik, hit the back button, and hit the reboot system button. That's it.
    Do not flash the version of SuperSU that TWRP offers to flash for you in order to give you root, it is not compatible and will cause problems. When you attempt to reboot out of TWRP it will tell you that it's detecting that you don't have root and it will offer to root for you, skip past this. You do have root, ignore this every time it comes up.

    z7e6jQa.jpg

    [SIZE=+1]7. How To Install A ROM with TWRP Recovery[/SIZE]

    Prerequisites: unlocked bootloader (section 1), TWRP recovery (section 2), vendor.img (section 9).

    Installing a ROM is a straight forward and easy process. Before you install anything you should make a nandroid backup (instructions above). Next, install the vendor.img that matches the Google security OTA that the ROM you want to install is based on. Find the vendor.img inside the factory images provided by Google then flash this file with fastboot (section 9).

    • Download a ROM and appropriate Gapps package and place on your device.
    • Boot into your custom recovery.
      • Select the wipe option from the TWRP home screen.
      • Perform a Factory Reset.
      • Select advanced wipe.
      • Check the system, data, cache, and dalvik cache options.
      • Swipe to wipe.
    • Install the ROM.
      • Select the install option from the TWRP home screen.
      • Navigate to where you have the ROM zip stored on your sd card and select it.
      • Swipe to install.
        Most ROMs will run an installer script at this point but some ROMs have what is called an Aroma Installer which allow you to choose some install options before the script runs.​
      • You will also need to install the appropriate gapps package directly after installing the ROM.
    • Once you've installed all necessary zips you'll have an option to wipe cache/dalvik and an option to reboot system. Wipe the cache/dalvik, hit the back button, and hit the reboot system button.

    z7e6jQa.jpg

    [SIZE=+1]8. How To Install A Custom Kernel With TWRP Recovery[/SIZE]

    Prerequisites: unlocked bootloader (section 1), TWRP recovery (section 2).

    A custom kernel can open up a new level of control over your device, such as overclocking/underclocking, undervolting, changing governors, changing I/O schedulers, adjusting colour calibrations, adjusting sound calibrations, and many other options.

    • Download a kernel that is compatible with your current ROM.
    • Check the md5 to verify its integrity.
    • Enter TWRP recovery.
    • Select the install option from the TWRP home screen.
    • Navigate to the kernel and select it.
    • Swipe to install.
    • You'll have an option to wipe cache/dalvik and an option to reboot system. Wipe the cache/dalvik, hit the back button, and hit the reboot system button.

    Once your phone has booted up you can use a kernel tuning app to change governors, I/O scheduler, clock speed, and other options. Some of the popular kernel apps are Kernel Auditor, EX Kernel Manager, Trickster Mod, No Frills, Kernel Tuner, and many more.

    z7e6jQa.jpg

    [SIZE=+1]9. How To Update To A New Build Of The Stock ROM[/SIZE]

    Prerequisites: unlocked bootloader (section 1).

    This method does not wipe your data, so you will keep your apps and settings. You should have no problems, however, if you experience problems you may need to perform a factory reset and flash again. Make a backup first and transfer it to your PC.

    • Download the latest build via the appropriate factory images for your model (Nexus 5X/Bullhead) here.

      Note: Android 7.1.2 and newer factory images do not contain cache.img. Do not wipe the cache.img for this process when using or moving to Android 7.1.2 or newer. If you have wiped cache.img, download the most recent Android 7.1.1 factory image and flash the cache.img from that zip archive.

    • Unzip the bullhead-xxxxxx-factory-xxxxxxxx (x's replace variables) into a directory on your PC (for this guide we'll use C:\bullhead\).
    • Once unzipped you should have a folder named bullhead-xxxxxx (x's replace variables). Open it and move the following files to a new directory named C:\bullhead\images\:
      • bootloader-bullhead-bullhead-xx.xx.img
      • radio-bullhead-bullhead-xx.xx.img
      (Please note that radio and bootloader naming changes from build to build so the filenames and below commands will change with them)
    • Within C:\bullhead\bullhead-xxxxxx\ you'll see another zip archive named image-bullhead-xxxxxx, unzip the contents of that zip into the C:\bullhead\images\ folder we created before. Now within C:\bullhead\images\ you should have the following files:
      • android-info.txt
      • boot.img
      • bootloader-bullhead-bullhead-xx.xx.img
      • cache.img
      • radio-bullhead-bullhead-xx.xx.img
      • recovery.img
      • system.img
      • userdata.img
      • vendor.img
    • Boot into the bootloader and connect your phone to your PC via usb cable.
    • Open a command prompt from within your fastboot folder (navigate to where you have fastboot.exe located on your PC, shift + right click anywhere within that folder, select open command prompt here), enter these commands to flash:
      Code:
      fastboot flash bootloader C:\bullhead\images\bootloader-bullhead-bullhead-xx.xx.img
      fastboot reboot-bootloader
      fastboot flash radio C:\bullhead\images\radio-bullhead-bullhead-xx.xx.img
      fastboot reboot-bootloader
      fastboot flash boot C:\bullhead\images\boot.img
      fastboot erase cache
      fastboot flash cache C:\bullhead\images\cache.img
      fastboot flash recovery C:\bullhead\images\recovery.img
      fastboot flash system C:\bullhead\images\system.img
      fastboot flash vendor C:\bullhead\images\vendor.img

      You can skip flashing the recovery if you wish, but even if you do the stock recovery may be patched on the first boot anyway. So you'll need to flash TWRP and SuperSU again if you need/want those, as well as any other system modifications you may have had.
    • You'll have to flash SuperSU again now, plus add any mods that you previously had.

    z7e6jQa.jpg

    [SIZE=+1]10. How To Flash The Factory Images (And Return To Stock)[/SIZE]

    Prerequisites: unlocked bootloader (section 1).

    This section will explain how to return the phone to be like it was when it came out of the box. This will wipe everything from the phone. If you wish to flash the factory images without wiping your personal data from the internal storage please move on to the next section.

    Note: Android 7.1.2 and newer factory images do not contain cache.img. Do not wipe the cache.img for this process when using or moving to Android 7.1.2 or newer. If you have wiped cache.img, download the most recent Android 7.1.1 factory image and flash the cache.img from that zip archive.


    • Go to Settings/Backup & Reset and perform a factory data reset. This will remove all of your user data from the device (apps, settings, photos, music, etc).
    • Download the appropriate factory images for your model here.
    • Unzip the bullhead-xxxxxx-factory-xxxxxxxx (x's replace variables) into a directory on your PC (for this guide we'll use C:\bullhead\).
    • Once unzipped you should have a folder named bullhead-xxxxxx (x's replace variables). Open it and move the following files to a new directory named C:\bullhead\images\:
      • bootloader-bullhead-bullhead-xx.xx.img
      • radio-bullhead-bullhead-xx.xx.img
      (Please note that radio and bootloader naming changes from build to build so the filenames and below commands will change with them)
    • Within C:\bullhead\bullhead-xxxxxx\ you'll see another zip archive named image-bullhead-xxxxxx, unzip the contents of that zip into the C:\bullhead\images\ folder we created before. Now within C:\bullhead\images\ you should have the following files:
      • android-info.txt
      • boot.img
      • bootloader-bullhead-bullhead-xx.xx.img
      • cache.img
      • radio-bullhead-bullhead-xx.xx.img
      • recovery.img
      • system.img
      • userdata.img
      • vendor.img
    • Boot into the bootloader and connect your phone to your PC via usb cable.
    • Open a command prompt from within your fastboot folder (navigate to where you have fastboot.exe located on your PC, shift + right click anywhere within that folder, select open command prompt here), enter these commands to flash:
      Code:
      fastboot flash bootloader C:\bullhead\images\bootloader-bullhead-bullhead-xx.xx.img
      fastboot reboot-bootloader
      fastboot flash radio C:\bullhead\images\radio-bullhead-bullhead-xx.xx.img
      fastboot reboot-bootloader
      fastboot flash boot C:\bullhead\images\boot.img
      fastboot erase cache
      fastboot flash cache C:\bullhead\images\cache.img
      fastboot flash recovery C:\bullhead\images\recovery.img
      fastboot flash system C:\bullhead\images\system.img
      fastboot flash vendor C:\bullhead\images\vendor.img

      If you wish to you can also relock the bootloader with this command:
      Code:
      fastboot oem lock
      (This command will wipe all user data from the device)

      Important: do not lock the bootloader unless you have first flashed the stock images. Locking the bootloader while you have a custom recovery installed can result in a brick. Please also note that the locking procedure will wipe all data on an encrypted device.

      Once all commands/flashes are complete you can reboot the device:
      Code:
      fastboot reboot

    z7e6jQa.jpg

    [SIZE=+1]11. How To Flash The Factory Images (Return To Stock But Leaving Internal Storage Intact)[/SIZE]

    Prerequisites: unlocked bootloader (section 1), TWRP recovery (section 2). Note: Android 7.1.2 and newer factory images do not contain cache.img. Do not wipe the cache.img for this process when using or moving to Android 7.1.2 or newer. If you have wiped cache.img, download the most recent Android 7.1.1 factory image and flash the cache.img from that zip archive.

    This section will explain how to return the phone to be like it was when it came out of the box, except it will not wipe any of your personal data (photos, music, etc) from the internal storage.


    • Download the appropriate factory images for your model here.
    • Unzip the bullhead-xxxxxx-factory-xxxxxxxx (x's replace variables) into a directory on your PC (for this guide we'll use C:\bullhead\).
    • Once unzipped you should have a folder named bullhead-xxxxxx (x's replace variables). Open it and move the following files to a new directory named C:\bullhead\images\:
      • bootloader-bullhead-bullhead-xx.xx.img
      • radio-bullhead-bullhead-xx.xx.img
      (Please note that radio and bootloader naming changes from build to build so the filenames and below commands will change with them)
    • Within C:\bullhead\bullhead-xxxxxx\ you'll see another zip archive named image-bullhead-xxxxxx, unzip the contents of that zip into the C:\bullhead\images\ folder we created before. Now within C:\bullhead\images\ you should have the following files:
      • android-info.txt
      • boot.img
      • bootloader-bullhead-bullhead-xx.xx.img
      • cache.img
      • radio-bullhead-bullhead-xx.xx.img
      • recovery.img
      • system.img
      • userdata.img
      • vendor.img
    • Boot into TWRP recovery and enter the wipe menu, select advanced wipe, check only the data box and swipe to wipe.
    • Go to the TWRP main menu and enter the reboot menu, select bootloader. The phone will now boot into the bootloader, once it has you can connect your phone to your PC via usb cable.
    • Open a command prompt from within your fastboot folder (navigate to where you have fastboot.exe located on your PC, shift + right click anywhere within that folder, select open command prompt here), enter these commands to flash:
      Code:
      fastboot flash bootloader C:\bullhead\images\bootloader-bullhead-bullhead-xx.xx.img
      fastboot reboot-bootloader
      fastboot flash radio C:\bullhead\images\radio-bullhead-bullhead-xx.xx.img
      fastboot reboot-bootloader
      fastboot flash boot C:\bullhead\images\boot.img
      fastboot erase cache
      fastboot flash cache C:\bullhead\images\cache.img
      fastboot flash recovery C:\bullhead\images\recovery.img
      fastboot flash system C:\bullhead\images\system.img
      fastboot flash vendor C:\bullhead\images\vendor.img
      Once all commands/flashes are complete you can reboot the device:
      Code:
      fastboot reboot

    z7e6jQa.jpg
    FAQ can be found in post #2!

    aDlDoZJ.jpg

    Donate To Me
    45
    [size=+1]Frequently Asked Questions[/size]

    1. How do I boot into the bootloader?

    Power off your device. Once it's powered off hold power + volume down and the phone will boot into the bootloader. You can also use the following adb command:
    Code:
    adb reboot bootloader
    You can also use an app called Quick Boot to boot into the bootloader directly from Android (root required).

    2. How do I boot into recovery?

    Boot into the bootloader (see above), use the volume keys to scroll through the options and use the power button to select the recovery mode option. You can also use the following adb command:
    Code:
    adb reboot recovery
    You can also use an app called Quick Boot to boot into the recovery directly from Android (root required).

    3. When issuing the fastboot flashing unlock command it doesn't work, I only get a list of possible commands. What's going on?

    This is usually due to having an outdated adb/fastboot setup. If you installed adb/fastboot by any means other than via the Android SDK this is probably the cause. Visit the prerequisites section in the beginning of this guide to properly install adb/fastboot and ensure that it's up to date.

    4. How do I take an OTA or update if I have root or other system modifications on the stock ROM?

    You can't take an OTA update while you have root or any system modifications. You'd need to use fastboot to flash the system, boot, and recovery images. It's much easier to just flash the newer build with fastboot, see section 9 of this guide for full instructions.

    5. Does taking an OTA update wipe my user data?

    No, it doesn't.

    6. Do I need to make an EFS backup?

    Absolutely yes. An EFS backup is extremely important. If your EFS partition becomes corrupt, your IMEI will disappear and you will not be able to use the phone as a phone. Without a backup it can be extremely difficult (or impossible) to restore your EFS. See the next question for an EFS backup related issue and solution.

    7. I have a bootloop after restoring my EFS backup in TWRP 3.0.2-1. What can I do?

    TWRP 3.0.2-1 and 3.0.2-2 are the first official TWRP releases with Nougat 7.0 or newer compatibility. Unfortunately, there are separate bugs affecting TWRP 3.0.2-1 and 3.0.2-2. A member of the TWRP development team details these issues right here. This link redirects to a thread in the Nexus 6P forums but also applies to the Nexus 5X. Read the original post of that same thread to learn how to resolve this EFS restore bootloop. You must use ADB and the phone must be booted in TWRP to resolve this issue. These ADB commands work on the Nexus 5X and 6P.

    8. Can I flash just the xxxxxx.img from the factory image without losing my data?

    Flashing userdata.img will format your entire phone (personal data including SMS/MMS, pictures, downloaded files, etc). You can flash any combination of these partitions (boot, system, vendor, radio, or bootloader) and this will leave your personal data intact. However, any mods that you have installed into system, vendor, or boot will be overwritten and returned to the default factory image setup when you flash these partitions. Flashing recovery.img or a newer version of your custom recovery will replace your existing recovery.

    9. After updating my ROM, I get this message on every boot: "There's an internal problem with your device. Contact your manufacturer."

    This warning indicates a mismatched vendor and system partition. The vendor partition was formerly integrated in the system partition for previous Nexus devices but is now a separate partition that must be flashed for each Google security update. Download a factory image and update your vendor partition using fastboot so that it matches your rom's OS build and monthly security update. If you have a file explorer installed on your phone, you can determine which vendor.img is installed by navigating to /vendor/build.prop and clicking on the build.prop. The specific vendor installed will be a combination of six numbers and letters listed in all capitals (example: NMF26F) in the ro.vendor.build.fingerprint line. These will always match up with the factory image of the same Android build (six digit alphanumeric name) for this device.

    Vendor.img is specific to each OTA and contains proprietary binaries for the phone that regularly receive updates to resolve security risks. If you are a custom rom user, make sure that you flash the vendor.img for the Google monthly security update that you are moving to. Be aware that sometimes AOSP roms utilize the AOSP master branch which has a newer Android build than the monthly security update for this device. You will still need to install that month's vendor.img.

    The phone will fail to boot if you mismatch the vendor.img with a different Android version. For instance, a 6.0 Marshmallow vendor.img will not allow your phone to boot on 7.0 Nougat. The vendor.img is typically not included in the custom rom zip but is often available as a separate download in the custom rom thread's first post.
    20
    Here is the modified boot image for MMB29K
    bullhead-mmb29k-mboot.zip (tested working)

    The boot image has the following modifications per Chainfires instructions, just like the modified mdb08i boot image:
    - patched sepolicy
    - disabled dmverity
    - disabled forceencrypt

    This is for system root.
    10
    Here are modified boot images for MDB08L & MDB08M & MMB29K
    bullhead-mdb08l-mboot.zip (tested working)
    bullhead-mdb08m-mboot.zip (tested working)
    bullhead-mmb29k-mboot.zip (tested working)

    These boot images have the following modifications per Chainfires instructions, just like the modified mdb08i boot image:
    - patched sepolicy
    - disabled dmverity
    - disabled forceencrypt
    7
    Updated 2015/12/23!

    Updated:


    I've edited the guide to include separate sections for systemless root and traditional root. I'll also be adding some extra information for updating and flashing the factory images soon. If I've missed any of the posts by @reddv1 that contain modified boot.img's please let me know and I'll add them to the traditional root section.

    EDIT: Extra sections for updating and flashing factory images have been added, plus a section on creating an EFS backup. I've also added an FAQ in the second post.