Many brands (Xiaomi, Huawei, Oppo) provide official unlock tools that require a PC. However, some offer unofficial or community-driven web interfaces.
For Xiaomi (before 2023), you could request unlock permission via Mi Unlock Tool (Windows only). No Termux. unlock bootloader via termux
For Samsung, bootloader unlock is simply toggling "OEM Unlocking" – no PC needed. But that’s not using Termux. Many brands (Xiaomi, Huawei, Oppo) provide official unlock
For OnePlus, you can use fastboot oem unlock from any fastboot-capable host – but again, Termux cannot act as that host unless you run a full Linux distribution via proot-distro with USB redirection (very advanced). Unlocking the bootloader of the device running Termux
Unlocking the bootloader of the device running Termux is theoretically complex.
The Android operating system employs a multi-stage boot process to ensure system integrity. The Bootloader acts as the gatekeeper, verifying the integrity of the kernel and recovery partitions before booting. Unlocking the bootloader is the first step in gaining root access or installing custom ROMs.
Traditionally, this process requires an external host machine running the Android SDK Platform Tools (adb and fastboot) connected via USB. This paper investigates methods to bypass the external host requirement by utilizing the Termux application to execute fastboot commands locally.