Unlock bootloader HTC One X at&t 2.20

In this tutorial we will guide you step-by-step on HTC One X AT&T 2.20 bootloader unlock:

HTC One X AT&T 2.20 is featured with 1.5 GHz Dual-core Krait Processor, a RAM of 1 GB, and a 16 GB internal memory. Like the previous HTC’s Smartphones, it has also created a large user base or fan base. With an affordable price range, they also have provided some really good features with an elegant design and stunning look.

So in this tutorial we will be showing you a tutorial on how to unlock HTC One X AT&T 2.20 bootloader. Just follow the simple steps given below:

Android Bootloader

Bootloader is a sort of programming code that must be executed just before any OS begin to run. Every Android-based smartphone has its own kind of Bootloader that orders and instructs its OS kernel to boot routinely or we can say ‘Normal Booting’. But it should be noted here that since an Android is an open source operating system and is bundled on an array of different hardware, therefore we find different classes of bootloader on different kinds of hardware. Although android is an open source operating system, still you will find a locked bootloader on the device. This is due to the reason that the device manufacturers want to keep the user on their particular Android OS version exclusively designed for that device. They would not like to see the user playing around with their OS’s security. When someone desires to flash the Custom ROM of his device for installing another Custom ROM, then his first step is to unlock the bootloader of the device.


This tutorial will definitely work when unlocking the Bootloader of HTC One X AT&T 2.20. On applying this update to another model or device may give an unwanted result. Due to unlocking of Bootloader, your Android device may lose its official Warranty and while applying this update we will not be responsible if anything occurs to your device, so continue at your own risk.

Just follow the simple steps given below:


  1. For successful completion of this tutorial charge your phone up to a minimum of 75% battery.
  2. You must take a back-up of all your personnel items and other impotent data, such as Call Logs, SMS, Contacts, Audios, Images, Videos, APN (Access Point Names) settings, Bookmarks, MMS settings, on your phone.
  3. Please ensure that all your security suites, like firewall and antivirus, on HTC One X AT&T 2.20 as well as on computer must be disabled.
  4. You must enable USB Debugging mode on your HTC One X AT&T 2.20. Just follow, Settingsà Applicationsà Developmentà USB debugging. There select the USB Debugging icon.
  5. You must install the latest Android SDK, HTC Sync, and Java Runtime on your Computer.

Steps for Unlocking the Bootloader of HTC One X AT&T 2.20:

Step 1

Firstly, go to the http://www.htcdev.com/.

Step 2

There, register yourself by creating an account. Next, confirm the activation by clicking on the given link in your E-mail ID. Then, finally, Log-In yourself to the website.

Step 3

Now, click on the ‘Unlock Bootloader’ option and then click on ‘Get Started’ option.

Step 4

Now select your HTC One X AT&T 2.20 from the dropdown menu and then click on ‘Begin Unlock Bootloader’ option.

Step 5

Next, click on ‘Yes’ option after reading the Message.

Step 6

Now, select both the options after reading it and then click on ‘Proceed to Unlock Instructions’ option.

Step 7

After extracting the above Fastboot.zip file in your computer, switch off your phone to enter into the Fastboot Mode. For this just press the Down Volume and Up Volume buttons simultaneously, and while pressing these buttons press down your Power button at the same time.

Step 8

Now, connect your HTC One X AT&T 2.20 smartphone to a computer via USB.

Step 9

Next, open the Command Pompt of your PC and type the following in it and then click enter.

“cd c:fastboot”

Step 10

Next, again type the following and then click enter:

Step 11

After this you will view a long segment of text, which is also known as “Identifier Token”. An example is shown below for you:

Step 12

Now, you just have to copy this text and paste it into the “My Device Identifier Token” box.

It must be noted here that you must copy the text from  upto . An example is shown below for you:

Step 13

After pasting the text in the box click on the Submit option.

Step 14

After this you will receive an instructional guide for further process from HTC with the attached “Unlock_code.bin” file.

Step 15

Now download the attached “Unlock_code.bin” file to your computer and then copy it in the Fastboot folder. Don’t run or try to open this file, just copy it there.

Step 16

Next, open the Command Pompt of your PC and type the following in it and then click enter.


Step 17

Now, on your phone choose Yes by using the Up Volume button and then confirm on it using the Power button.

Step 18

After the completion of unlocking of Bootloader process, you should select the “reboot system now” option to restart your device, and then reboot it in the Normal Mode.

Step 19

After this, you’ll have an unlocked Bootloader on your HTC One X AT&T 2.20.


Get some more about Android basics: