How to Unlock Bootloader On LG G4 H815 Smartphone With Official Method.

Unlock Bootloader On LG G4 H815. We know that LG G4 H815 smartphone has many advanced features in it, and have a great prize, But some people feel hesitate because LG G4 H815 came with a locked bootloader. Why someone needs to unlock the bootloader on LG G4 H815? This is the reason why should anyone unlock the bootloader. Someone tries to unlock the bootloader on LG G4 H815 because they want to activate developer option or want to install custom or modified ROMs, flash a custom recovery and other tweaks on their phones. So.. they have to unlock the bootloader on LG G4 H815.

When you finished flash custom recovery, you would give tons of features and install other tweaks that require full system access to your android devices. Now, I will explain to you how to unlock the bootloader on your LG G4 H815 phones devices.

Attention :  Unlocking your device may void all or parts of your warranty by LG. and you will never get OTA updates by LG. And one thing should you know that in this guide we can not get back our bootloader. it's mean you can Relock Bootloader. So, Beware what will you do. 

Risks Unlock the Bootloader.

guidebelajar on this guide can no longer guarantee the full functionality of your LG G4 H815 device after you unlock the bootloader. Unlocking your LG G4 H815 device may cause unexpected side effects that may include but are not limited to the following:

• Your LG G4 H815 device may stop working.
• Certain features and functionalities may be disabled. 
• Your LG G4 H815 device may become unsafe to the point of causing you harm.
• Your LG G4 H815 device becomes physically damaged due to overheating.
• The behavior of your device may be altered.
• Some content on your device may no longer be accessible or playable due to invalid DRM keys. 
• All your user data, settings, and accounts may disappear. (Therefore, we recommend that you backup all your data).

Guide To Unlock Bootloader LG G4 H815.

Before you follow this guide, make sure you have installed ADB drivers and enabled OEM unlock. You will need the drivers for the computer to recognize the LG G4 H815 and OEM unlock needs to be enabled so the LG G4 H815 can go in fastboot mode.

1. Make sure you have the battery fully charged, we recommended that you have 80% of the power
2. Warning: Your LG G4 H815 might go dead permanently when your phone goes off suddenly because your battery power is not charger properly when you performing flash ROMs or installing mods and updates
3. Always backup your important data, like music, video, and other application will delete or wipe all. So, you must backup all data before unlocking the bootloader. for backup SMS data, you can see this guide
4. Now you Go here, register and create a new account.

http://developer.lge.com/main/RegisterCheck.dev

5. You will receive a confirmation to your email.
6. Then click the link to confirm and activate your account.
7. Now Go to this page again to unlock the bootloader of the LG G4 H815.

http://developer.lge.com/main/RegisterCheck.dev

• or you can go to the menu :
• Resource Centre ->
• Android ->
• Unlock Bootloader
• Then scroll down to the bottom the of the page and you will see Starting Unlock The Bootloader button.
8. On the screen, you must fill all available form.

   

   Lg form

9. Select your phone with model number LGH815 and enter the IMEI number as well as your Device ID.
10. You can check your IMEI number by entering *#06#  on the dial pad.
11. Or you can going to Settings >> About phone >> Status >> IMEI menu.
12. Download and install the latest Android SDK (adb.exe, AdbWinApi.dll, fastboot.exe) from developer.android.com
13. Create a new folder (for example D:\tools) and copy the following three files to the new folder:
• Adb.exe
• AdbWinApi.dll
• Fastboot.exe 
14. You can find these three files from sdk\platform-tools
15. Then enable USB debugging on your LG G4 H815. see this guide
16. Now, enable OEM unlock, To enable OEM unlock, go to Settings >> Developer options and check to Enable OEM unlock.
17. Then, Enter your phone’s unique Device ID. 
• You can view the Device ID by connecting your phone to the PC using a USB cable and entering "adb reboot bootloader" in DOS command window of the folder you created in the previous step. for example: C:\tools
• Your phone will reboot into the fastboot mode. Enter "fastboot oem device-id" in DOS command window.
18. This fast boot command will return a character string. This is the Device ID which is needed to generate your unique unlock key.

    

    device ID
19. You will get two lines of numbers. Copy them into a single line and enter them on the required fields on the unlock bootloader page.
• example : CD58B679A38D6B613ED518F37A05E013F93190BD558261DBBC5584E8EF8789B1
20. Then, Click Confirm. If your IMEI number and Device ID are valid, the bootloader unlocks key will be sent to your email.
21. You will receive an email from LG with an attached file called unlock.bin.
22. Download your bootloader unlock the key to your phone by connecting your phone to PC using the USB cable and entering "adb reboot bootloader" in DOS command window.
23. Your phone will reboot into the fastboot mode.  
24. Go to the directory where you downloaded your bootloader unlock key.
25. Then you can Open the command prompt again on the folder where a unlock.bin file is located and enter this command:
• fastboot flash unlock unlock.bin
26. Reboot your phone by entering “fastboot reboot” in DOS command window.
27. Connect your phone to a PC using a USB cable and enter "adb reboot bootloader" in DOS command window.
28. Your LG G4 H815 will reboot into the fastboot mode. 
29. You can check if the LG G4 H815 device is successfully unlocked, 
30. Now, you can check by entering "fastboot getvar unlocked" and verifying that the response is "unlocked: yes"
31. Your LG G4 H815 will now have an unlocked bootloader and you can install a custom recovery and root the phone.

How to Unlock Bootloader On Asus Zenfone 2 Smartphone.

Unlock Bootloader On Asus Zenfone 2. We know that Asus Zenfone 2 smartphone has many advanced features in it, and have a great prize, But some people feel hesitate because Asus Zenfone 2 came with a locked bootloader. Why someone needs to unlock bootloader? This is the reason why should anyone unlock the bootloader. Someone try to unlock bootloader because they want to activate developer option or want to install custom or modified ROMs, flash a custom recovery and other tweaks on their phones. So.. they have to unlock the bootloader.

When you finished flash custom recovery, you would give tons of features and install other tweaks that require full system access to your android devices. Now, I will explain to you how to unlock the bootloader on your Zenfone 2 phones devices.

Unlock Bootloader On Asus Zenfone 2

Attention :  Unlocking your device may void all or parts of your warranty by Asus Zenfone. and you will never get OTA updates by Asus Zenfone. And one thing should you know that in this guide we can not get back our bootloader. it's mean you can Relock Bootloader. So, Beware what will you do. 

Guide To Unlock Bootloader Zenfone 2.

1. Make sure you have the battery fully charged, we recommended that you have 80% of the power
2. Warning: Your Asus Zenfone 2 might go dead permanently when your phone goes off suddenly because your battery power is not charger properly when you performing flash ROMs or installing mods and updates
3. Always backup your important data, like music, video, and other application will delete or wipe all. So, you must backup all data before unlocking the bootloader. for backup SMS data, you can see this guide 

http://guidebelajar.blogspot.com/2015/05/guide-to-backup-and-restore-sms-on.html

4. Next step is Update your Asus Zenfone 2 to 2.19.40. you can update your device with OTA or the other method.
5. Then you have to root your Asus Zenfone 2, see this guide 

http://guidebelajar.blogspot.com/2015/05/cara-root-asus-zenfone-2-ze500cl.html

6. D0wnload and install adb on your PC or laptop. to download and the other detail instruction you can visit this page 

http://guidebelajar.blogspot.com/2015/05/how-to-flash-asus-zenfone-2-with-adb.html

7. D0wnload and Install USB Driver for Asus Android. you can d0wnload here.

http://dlcdnet.asus.com/pub/ASUS/ZenFone/ZE500CL/ASUS_Android_USB_drivers_for_Windows_20150212.zip

8. Then, connect your Asus Zenfone 2 to your PC or laptop using USB cable driver.
9. Then you can open a command prompt in your windows PC (in the same folder with ADB). to open a command prompt you can click start, then on the search programs and files, you can type cmd then follow with hit the enter button.

   

   Unlock Bootloader On Asus Zenfone 2

10. Check the connection between Asus Zenfone 2 with your PC or laptop by type adb devices. If your connection is connected successfully it will list Asus Zenfone 2.
11. Then type adb shell and (pressed enter)
12. Then type su (pressed enter)
13. Then type getprop ro.isn > /factory/asuskey ( pressed enter)
14. Then type reboot bootloader ( pressed enter )
15. Phone will restart in recovery, after updating it the self phone will restart and ASUS splash screen will be white ( locked bootloader has a black screen, you will see the difference yourself)
16. Next step, you can d0wnload a black splash screen from here .Password = 0222.

https://drive.google.com/open?id=0B1wYZ5Lb11BVR0dlMVpMV1EzdEE&authuser=0

17. Then, navigate to adb folder opened cmd and typed the following commands
• adb reboot bootloader (pressed enter)
• fastboot devices (pressed enter)
18. You can see if your Asus Zenfone 2 device is listed, then write following
• fastboot flash splashscreen splashscreen.img (pressed enter)
19. Finally restart your phone and Now black splash screen is back. 
20. Congrats your bootloader Asus Zenfone 2 is now unlocked.

Guidebelajar will not take any responsibility, I just shared this experience from here 

http://forum.xda-developers.com/zenfone2/general/congrats-to-bootlocker-unlocked-t3138547

How to Unlock Bootloader On HTC Smartphone Device.

Unlock Bootloader On HTC. We know that HTC Phones devices always came with a locked bootloader. why someone needs to unlock bootloader? This is the reason why should anyone unlock the bootloader. Someone try to unlock bootloader because they want to activate developer option or want to install custom or modified ROMs, flash a custom recovery and other tweaks on their phones. So.. they have to unlock the bootloader.

When you finished flash custom recovery, you would give tons of features and install other tweaks that require full system access to your android devices. Now, I will explain to you how to unlock the bootloader on your HTC phones devices.

Unlock Bootloader On HTC

Attention :  Unlocking your device may void all or parts of your warranty by HTC.

What Should your prepare?

1. Make sure that your device is HTC phone because our guide is specifically for HTC phones only.
2. Download and install USB Driver of your HTC phone.
3. Download and extract fast boot file in C:/drives.

https://www.htcdev.com/process/legal_fastboot_win

4. After you install it, connect your device to your PC or computer
5. Download HTC Sync for USB drivers. Here

http://www.htc.com/www/help/

6. Next step that should you do is make sure your phone battery is 70% - 80% charged.
7. Warning: Your phone might go dead permanently when your phone goes off suddenly because your battery power is not charger properly when you performing flash ROMs or installing mods and updates
8. All your important data, like music, video, and the application will delete or wipe all. So, you must backup all data before unlocking the bootloader.

Guide to Unlock Bootloader.

I will explain to you step by step how to unlock the bootloader on HTC smartphone. You must read all the activity carefully before you apply to perform it to your HTC smartphone devices.

1. At the first, you must Visit HTCDev.com. Here 

   http://www.htcdev.com/
2. When the website was opened, you can find register link on top of the page, then you click it to create an account at HTCDev website.

   

   Unlock Bootloader On HTC

3. Fill all form that appears on the website. be careful to make a password, you have to use minimum One Uppercase, One Lower Case, and One Number combination.
4. After you finished filling all registration form, you will see notification page that you have completed registration.
5. Next step is Activate your account by open your Inbox at your Email.
6. When you find new Email from HTCDev, Open it and find a link like this picture below. then click it.
7. You will redirect to Account Activation Page, that gives you a notification if your account is activated.
8. Now, you open HTCDev.com. Here again to Log in using your activated account.

   http://www.htcdev.com/
9. Then click on Unlock Bootloader button.

   

   Unlock Bootloader On HTC

10. And click Get Started button

    

    Unlock Bootloader On HTC

11. It will show you about Unlocking Bootloader page, below the Supported Device you can find your device by click Select Your Device drop-down list. Then you click Begin Unlock Bootloader.
12. You must Carefully read the warning popup message and then press the ‘Yes’ button.
13. Check both the boxes in the Legal Terms popup box. Now press the “Proceed to Unlock Instructions” button.
14. Now we back to our HTC smartphone device.
15. Turn Off your HTC by Press and Hold Power Button for 10 seconds
16. After your HTC smartphone devices fully turn off, press Volume down and Power Button to start your device into Bootloader Menu.

    

    Unlock Bootloader On HTC

17. When you in bootloader menu, Use the Volume buttons to select up or down. Then you Highlight Fastboot and press the Power button to select.
18. After you done it, now connect your HTC device to your PC with USB Cable.
19. Then Activate your windows command prompt, by press and hold windows logo + R, then you type cmd.exe
20. when command prompt window opened, now you can type the following command and press Enter.
21. type : cd c:/fastboot

    

    Unlock Bootloader On HTC

22. then type: fastboot oem get_identifier_token
23. Now, you will see long integer as your token, then you open this page.

    http://www.htcdev.com/bootloader/unlock-instructions/page-3

    

    Unlock Bootloader On HTC

24. Copy and paste this text into the token field below (in the Windows command prompt: Right Click > Mark > highlight the block of text > Right click to copy. Mac users can use cmd-option to mark and select text.).
25. When copying the token, start with this line: <<<< Identifier Token Start >>>> 
26. And end with this line: <<<<< Identifier Token End >>>>> 
27. Note: Only copy the highlighted sections above. Do not copy the INFO or (bootloader) prefix
28. After you copied, paste that identifier token into the box at the bottom of that HTCDev page and then click Submit.
29. Then You will receive an email from HTC (on the registered email) with a link to the second part of the instructions and your “Unlock_code.bin” file attached.
30. Download “Unlock_code.bin” and save it in your Fastboot folder (C:\fastbooot in our case).
31. Now type the following command in Command Prompt and press Enter. fastboot flash unlock tokenUnlock_code.bin.
32. Then Check your phone. Read on-screen instructions. Press Volume Up to accept and the Power button to confirm.

Now you can install custom ROMs, flash a custom recovery and perform other system tweaks on your HTC phone because your HTC Smartphone device has Unlock Bootloader. congratulation.

I'm as Guidebelajar or the developers are not to be held responsible if you damage or brick your device.