Before Termux can talk to your device, you must enable debugging on the phone itself.
: An unlocked bootloader allows for custom ROMs and root access but makes the device vulnerable to physical tampering. If the device is lost or stolen, a sophisticated attacker could theoretically bypass certain system protections.
Because Android is built on top of the Linux kernel, a secondary Android device running Termux can act exactly like a Linux PC. By installing the official Android platform tools within Termux, your host phone can command, reboot, and unlock the bootloader of a secondary target phone connected via a physical cable. Critical Prerequisites Before You Begin
While traditional methods rely on a Windows or Linux PC, the Termux approach brings the terminal experience directly to your mobile device, making it a favorite for those without desktop access. Setup and Ease of Use
Connect the standard data cable from the OTG adapter to the . unlock bootloader using termux link
Do not download Termux from the Google Play Store, as that version is outdated and no longer maintained. Instead, download the latest version from or GitHub.
Unlocking the bootloader is the first step toward advanced Android customization. It allows for installing custom ROMs, kernels, and rooting. Traditionally, this requires a computer with Android Debug Bridge (ADB) and Fastboot tools installed. However, you can achieve this directly from your phone using .
This is the legitimate method to unlock from your phone using another phone as the "PC".
The phone will format its data partitions and reboot into a factory-clean state with an unlocked bootloader. Brand-Specific Limitations to Keep in Mind Before Termux can talk to your device, you
Any functional Android phone that supports OTG. Target Device (Device B): The phone you want to unlock.
Ensure that power-saving mode is turned off for Termux on your host phone. Android's aggressive background battery optimization can put Termux to sleep mid-command, which risks interrupting critical flashing sequences. If you plan to proceed with this setup, let me know:
This comprehensive guide covers the prerequisites, step-by-step terminal commands, and safety measures required to successfully unlock your bootloader using Termux. ⚠️ Important Warning and Risks
Back on your host device inside the Termux app, check if the host can see the target phone by typing: adb devices Use code with caution. Because Android is built on top of the
ln -s $PREFIX/bin/adb $PREFIX/bin/adb-link ln -s $PREFIX/bin/fastboot $PREFIX/bin/fastboot-link
This guide provides a step-by-step process for using Termux to send unlock commands to your Android device. Prerequisites
The short answer is . You cannot use Termux to unlock the bootloader of the same device it is running on. Instead, you can use one Android device running Termux to unlock the bootloader of a second Android device via a physical USB cable link.
: fastboot devices (If you see your serial number, you are ready).