The target phone's screen will instantly change to a warning page. Use the physical Volume Keys to highlight "Unlock the bootloader" and press the Power Button to confirm.
Within Termux, Alex installed the necessary tools by running the following command:
With the link verified and the target device in fastboot mode, you are ready to send the unlock command.
, disable specific security features (like Samsung Knox), and render banking apps or OTA updates inoperable, depending on the device. Proceed at your own risk. How to Unlock Bootloader Using Termux: A Complete Guide
The target phone will turn off and boot into a screen that usually displays a dead Android robot or the words "Fastboot Mode". Step 6: Execute the Unlock Command unlock bootloader using termux link
You use one Android device (Device A) with Termux installed, connect it via USB-C to USB-C cable to your target device (Device B), and send ADB/Fastboot commands from Device A to Device B.
Unlocking a bootloader triggers a mandatory hardware-level cryptographic wipe. This process deletes all user data, internal storage files, encryption keys, and application caches to prevent unauthorized access to user data via custom recoveries. 2. Security Downgrade
Once the tools are installed, you will use Termux to send the unlock command. 1. Grant Root Permissions Termux needs root access to interface with the bootloader. su Use code with caution. (Grant the prompt in Magisk or your root management app) 2. Reboot to Bootloader/Fastboot Mode reboot bootloader Use code with caution.
adb devices
Unlocking your Android device's bootloader is the first step toward flashing custom ROMs, installing custom recoveries like TWRP, and gaining root access. Traditionally, this process requires a desktop computer, a USB cable, and the Android SDK Platform Tools.
A prompt will pop up on the target phone asking to "Allow USB debugging?". Check the box that says "Always allow from this computer" and tap .
Standard Termux apps do not have the low-level kernel access required to modify the device's own secure boot partitions. The Working Workaround: Device-to-Device (D2D) Link
Since Termux does not come with ADB/Fastboot pre-installed, you need to install the necessary packages. The target phone's screen will instantly change to
Before attempting this process, ensure you have gathered all necessary hardware and met the software prerequisites. Hardware Needed
Before proceeding, understand that unlocking your bootloader comes with permanent changes to your device software status:
Unlocking the bootloader triggers a mandatory factory reset. All photos, apps, and data on the target device will be permanently erased.
: If Termux can't see the device, ensure the OTG host phone has USB Debugging enabled as well. : For a detailed visual walkthrough, see the DroidWin Termux ADB Guide Are you unlocking a specific brand , disable specific security features (like Samsung Knox),
Run adb devices again in Termux. The target device should now change from showing unauthorized to device . 🔄 Step 4: Boot the Target Device into Fastboot Mode