Unlocking the bootloader using Termux is a game-changer for those without access to a PC. By leveraging the ADB/Fastboot link between two Android devices, you can bypass the need for a computer entirely and begin your journey into Android customization.
Enable (Crucial: If this is greyed out, connect to Wi-Fi or wait a few days as per your manufacturer’s policy). Enable USB Debugging . Step 2: Install ADB & Fastboot in Termux
Depending on your device age/brand, use one of these commands: fastboot flashing unlock For older devices: fastboot oem unlock unlock bootloader using termux link
If Termux can't see the device, try running pkg install libusb .
Connect the two phones using the USB OTG cable. The host phone (with Termux) should be connected to the "USB-A" side of the adapter, and the target phone should be connected to the "USB-C/Micro" side. Unlocking the bootloader using Termux is a game-changer
On the "Host" phone (the one with Termux installed), open the app and run the following commands to set up the necessary tools:
Brands like Motorola or Sony require a unique "Unlock Key" from their official website. You can fetch your "Unlock Data" via Termux using fastboot oem get_unlock_data and paste it into their portals. Conclusion Enable USB Debugging
Go to and tap Build Number 7 times to enable Developer Options. Navigate to Settings > System > Developer Options .
If you see a serial number followed by "device," the link is successful. Step 5: Boot into Fastboot Mode