Follow these steps carefully to set up your environment and execute the unlock command. 1. Prepare the Host Device
The most significant advantage is portability. If you do not own a laptop or desktop computer, or if you are traveling, Termux offers a completely PC-free path to unlocking a bootloader.
The android-tools package installs the Linux versions of ADB and Fastboot directly into your Termux environment. Step 3: Connect the Devices Connect the OTG adapter to the .
This is the part: Termux can programmatically claim the USB port the bootloader is using, something a PC struggles with (driver issues).
Download the latest builds exclusively from Termux on GitHub or F-Droid (avoid the outdated Play Store version).
Your phone now restarts into fastboot mode (black screen with small text).
You do not need a laptop or desktop to root, flash, or modify your device. If you are travelling, experiencing a bootloop away from home, or simply do not own a PC, a secondary phone running Termux serves as a fully functional flashing station. Portability and On-the-Go Emergency Recovery
This guide explains how to unlock your bootloader using Termux better—more efficiently, securely, and with a focus on preparing your environment for success.
Lock and unlock the bootloader | Android Open Source Project
If Termux returns blank space under fastboot devices , check your physical hardware. Clean the USB ports, ensure the OTG adapter is plugged into the host phone (not the target phone), and try a different cable. Termux Permission Denied
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.