If you see a serial number, the connection works.
The next step was to boot his device into Fastboot mode. Rohan typed: unlock bootloader using termux
To understand how Termux facilitates a bootloader unlock, one must first grasp the role of the bootloader. It is the first piece of software that runs when a device powers on, responsible for loading the operating system kernel. Manufacturers lock this component as a security measure to prevent unauthorized firmware modifications. Unlocking it is the prerequisite for installing custom ROMs, kernels, or gaining root access. While the "Termux method" still technically requires a second Android device to act as the "host," it removes the necessity for a traditional PC, making the process highly portable and accessible to those without desktop hardware. If you see a serial number, the connection works