Unlocking your bootloader using Termux is a popular "PC-less" method that essentially turns a second Android phone into a replacement for a computer. This method uses ADB and Fastboot
within the Termux environment to send commands to the target device via a USB OTG connection. Prerequisites Two Android Phones
: One is the "Host" (running Termux) and the other is the "Target" (device to be unlocked). USB OTG Cable/Adapter : To connect the two phones. Data Backup : Unlocking the bootloader wipes all user data and may void your warranty. Developer Settings : On the target device, enable USB Debugging OEM Unlocking Settings > Developer Options Step-by-Step Guide 1. Prepare Termux on the Host Device Download and install Termux from
for the most up-to-date version. Open Termux and run the following commands to install the necessary tools:
pkg update && pkg upgrade pkg install termux-api pkg install tur-repo pkg install termux-adb Use code with caution. Copied to clipboard Note: Using a tool like termux-adb unlock bootloader using termux better
is often better than standard packages as it is specifically optimized for Android-to-Android connections. 2. Connect the Devices
Connect the Host (with OTG adapter) to the Target device via USB cable.
Ensure the Target device prompts you to "Allow USB Debugging" and select "Always allow". 3. Reboot to Bootloader/Fastboot
In the Termux terminal on the Host device, verify the connection and reboot the target: termux-adb devices termux-adb reboot bootloader Use code with caution. Copied to clipboard Wait for the target device to enter Fastboot/Download mode. 4. Execute the Unlock Command Unlocking your bootloader using Termux is a popular
Once the target is in Fastboot mode, run the unlocking command: termux-fastboot devices termux-fastboot flashing unlock Use code with caution. Copied to clipboard
A "better" way to unlock a bootloader using Termux would be an integrated Interactive Bootloader Setup Assistant.
Currently, unlocking a bootloader via Termux is a manual, multi-step process that requires setting up external tools like termux-adb and termux-fastboot and using an OTG cable to connect to the target device. A dedicated feature would automate these technical hurdles into a guided workflow. Feature: Interactive Bootloader Setup Assistant
This feature would act as a "wrapper" script or built-in plugin that manages the entire Unlock Bootloader process from within the Termux terminal. Unlocking Bootloaders - postmarketOS Wiki Permissions issue: su chmod 666 /dev/bus/usb/*/*
There is a pervasive myth in the Android modding community that if you are "leet" enough, you can bypass OEM restrictions and unlock a bootloader directly from the device using Termux.
The short answer is: You cannot.
The longer answer requires an understanding of how Android's security architecture works. To understand why Termux fails here, you have to understand the hierarchy of trust on an Android device.
Disclaimer: Unlocking a bootloader voids warranties on most devices, erases all user data, and can potentially brick your phone if done incorrectly. This article is for educational purposes. The author assumes no liability for any damage. Always check your device manufacturer’s official unlocking policy first.
fastboot devices shows ????????????su
chmod 666 /dev/bus/usb/*/*
termux-setup-storage
Key package: android-tools includes adb and fastboot. But on unrooted phones, fastboot cannot send lock/unlock commands directly—it requires root or a special USB permission.