Here is a complete guide on how you can unlock HTC One A9’s booloader running Android 6.0 Marshmallow. Fortunately, you can buy this phone in a Developer Edition variant which comes with a bootloader that’s already unlocked. If you have the other variant, don’t worry, you would be able to unlock it via this quick guide. The process itself is simple and easy. Before stepping onto the details, we recommend you back everything up which will make it easier to revert. Also, once unlocked, you would be able to flash TWRP recovery and other goodies. You can now unlock bootloader of HTC One A9 as per our complete guide below.
As you continue reading below, we will guide you on how to unlock One A9 bootloader for doing a lot of things with your phone. You may ask, why do we even need to unlock it in the first place? Well, unlocking allows you to install a custom recovery, flash custom ROMs, install latest Android updates with a factory image and do other nasty stuff with your phone — most of all, you will be able to root One A9 on Android 5.0 and enjoy the various root apps. Just to be clear, unlocking bootloader will wipe ALL your data from the phone. So make sure you backup everything or unlock bootloader on a new device with nothing to lose.
Disclaimer: All the tools, mods or ROMs mentioned below belong to their respective owners/developers. We (TeamAndroid.com) or the developers are not to be held responsible if you damage or brick your device. We don’t have you on gun point to try out this tutorial 😉
There are tons of useful articles and how-to guides on Team Android for the HTC One A9, but we think you might be interested in the following posts:
- Install TWRP on One A9: How to Update One A9 with TWRP Custom Recovery – Tutorial.
- Try Lollipop on Computer: How to Try and Install Android 5.0 Lollipop on Computer – Complete Guide.
- Custom ROMs: For a complete collection of custom ROMs on Team Android, visit our Custom ROM section!
If you plan on rooting this phone or are still confused for why to root One A9, read: Benefits of Rooting Your Android Device.
HTC One A9 USB Drivers
You will need to connect your Android phone with the computer. For that, please make sure you have installed the USB drivers for HTC One A9 properly. If not, you can download the latest official drivers from our Android USB Drivers section here:
Backup and Other Important Tips
Done with the USB drivers? Perfect. The tutorial is on the next page, but first, please take a look at the following tips and important points you need to take care of. These are important, as we don’t want anyone losing their personal data or apps:
Always backup your important data that you might need after you install a new custom ROM, an official software update or anything else. Make a backup for just in case, you never know when anything might go wrong. See below for some tips on how to backup data:
- Backup your Apps. How? –> How to Backup Android Apps.
- Backup your SMS messages. How? –> How to Backup/Restore SMS Messages.
- Backup Contacts, Gmail and Google Data. How? –> Sync with Google Sync.
- Backup Call History. How? –> How to Backup Call History.
- Backup WhatsApp Messages. How? –> How to Backup/Restore WhatsApp Messages.
- Backup APN Settings: GPRS, 3G, MMS Settings. How? Note down everything from: Settings > Wireless & Networks (More…) > Mobile networks > Access Point Names.
If you already have a custom recovery (ClockworkMod, TWRP etc.) installed on your phone, we strongly recommend a backup using that as it creates a complete image of your existing phone / phone set up.
A few more optional tips that you should remember:
1. Having problems connecting your Android phone to the computer? You need to enable USB debugging mode. See here: How to Enable USB Debugging — for Gingerbread, Ice Cream Sandwich, Jelly Bean, KitKat and Lollipop.
2. Make sure your Android device is charged up to 80-85% battery level. This might help you: How to Check Battery Percentage. Why? Because, if your phone goes off suddenly while installing a custom ROM, flashing an official firmware update or installing mods etc. — your phone might get bricked or go dead permanently. No one wants that, right?
4. Most of the tutorials and how-to guides on Team Android are for factory unlocked Android phones and phones. We recommend not to try our guides if your phone is locked to a carrier, unless we have specified the carrier name or device model.
5. [IMPORTANT] Copy all the backup files from your SD card to your computer as internal memory will be wiped clean while unlocking the bootloader.
If you find the above tips useful and they were helpful to you, please consider giving us a +1 or LIKE to thank us!
If you are a developer and would want to unlock the bootloader, we recommend doing that before you set up the Google Play Store, install apps or anything because the security feature in Android clears out everything from your phone when unlocking bootloader of the phone.
Now, let’s proceed with the tutorial below to unlock One A9 bootloader.
How to Unlock HTC One A9 Bootloader
We have put together a detailed step-by-step instructions guide on how to unlock bootloader on One A9. If you are used to unlocking bootloaders on any previous HTC devices, then this should not be any different for you.
Please read every line carefully and make sure you read the tutorial once before actually performing it on your Android device.
- This unlocking bootloader tutorial is only for HTC One A9. Please don’t try this on any other variants of the phone.
- This tutorial has been performed on Windows, but anyone familiar with Fastboot on Mac or Linux can perform this as well with the same commands.
- Make sure you backup all your data in your phone before proceeding as it will erase all data.
- You will void your warranty by unlocking the bootloader.
- One A9
- USB cable
- Android SDK with drivers (How to set up? Tutorial link given below)
NOTE: A new checkbox has been added in the Developer options in Settings that you have to enable before proceeding below with unlocking your bootloader. First, enable Developer options. Then check the box that says “Enable OEM unlock”. That’s it. Now you can proceed below to the Step 1.
Step 1 – Go to HTCDev.com website.
Step 2 – Click on ‘Register’ and create an account at the HTCDev website.
Step 3 – Activate your account. Login and go to main page of HTCDev.
Step 4 – Click on “Unlock Bootloader” button and click the “Get Started” button.
Step 5 – Select “All Other Supported Models” from the dropdown list and then click the “Begin Unlock Bootloader” button.
Step 6 – Carefully read the warning popup message and then press the ‘Yes’ button.
Step 7 – Check both the boxes in the Legal Terms popup box. Now press the “Proceed to Unlock Instructions” button.
Step 8 – Download Android SDK Platform-Tools (Fastboot) if you don’t already have and extract it in C:\ drive (or anywhere in your computer).
Step 9 – Hold the Power button on your HTC device for 10 seconds to completely turn it off.
Step 10 – Now go to Bootloader Mode on your device. How? Press Volume Down and Power to start the device into Bootloader mode.
Step 11 – Use the Volume buttons to select up or down. Highlight Fastboot and press the Power button to select.
Step 12 – Connect your HTC device to the computer via a USB cable.
Step 13 – Now open Command Propmpt. How? Click the Start button and type ‘cmd’ (without quotes) and press Enter.
Step 14 – In the Command Prompt window, type the following command and press Enter.
Step 15 – Now type the following command and press Enter.
fastboot oem get_identifier_token
Step 16 – You will see a long string of text (identifier token). What to do now? Open this page on HTCDev.
Step 17 – Now follow the instructions as given there to select and copy text from Command Prompt.
Step 18 – Once copied, paste that identifier token into the box at the bottom of that HTCDev page and then click Submit.
Step 19 – You will receive an email by HTC (on the registered email) with a link to the second part of the instructions and your “Unlock_code.bin” file attached.
Step 20 – Download “Unlock_code.bin” and save it in your Fastboot folder (C:\fastbooot in our case).
Step 21 – Now type the following command in Command Prompt and press Enter.
fastboot flash unlocktoken Unlock_code.bin
Step 22 – Check your phone. Read on-screen instructions. Press Volume Up to accept and the Power button to confirm.
That’s it! Your One A9 bootloader is now unlocked! You can now install a custom recovery, a custom ROM or any system tweak you like. Just be careful with what you do! 😉
Next, you can install TWRP custom recovery on One A9: How to Update One A9 with TWRP Custom Recovery – Tutorial.