Ensure you are running the terminal inside the exact directory containing fastboot.exe . If using PowerShell or Mac Terminal, remember to prepend ./ to your commands (e.g., ./fastboot devices ).
By default, manufacturers ship devices with a locked bootloader to prevent unauthorized software modifications. Unlocking it unlocks deep administrative privileges:
Samsung devices typically require enabling "OEM Unlock" in Developer Options (which may be hidden or require 7 days of uptime on some models), then using volume keys in download mode to initiate unlock. Free third-party tools like assist with FRP bypasses and firmware downloads, but bootloader unlocking on Samsung is largely official. Paid tools like Octoplus and Z3X exist, but are not free.
Your phone will boot up normally. The first boot will take longer than usual because the system is rebuilding the user data cache from scratch. You will also see a brief warning splash screen during every subsequent boot indicating that the device software cannot be verified. This is completely normal. Brand-Specific Nuances (When Standard Commands Need Keys)
You must manually permit your system to accept automated boot modifications. On your device, navigate to > About Phone . unlock bootloader command free
Congratulations! You have successfully used the method. Your phone now reads "Device state: unlocked" or shows an ugly warning screen on every boot.
: Your carrier may have permanently locked the bootloader block. Double-check that you turned on "OEM Unlocking" in your developer options before rebooting.
fastboot oem unlock
Wait for your device to restart into a special screen with text. Ensure you are running the terminal inside the
After entering the command, look at your phone’s screen. A prompt will appear asking you to confirm. Use the volume keys to navigate and the power button to select or "Unlock Bootloader."
You don’t need the full Android SDK. Download the official, lightweight . 2. Install Drivers (Windows Only)
Go ahead and give your device the freedom it deserves, with the confidence that you have the right tools and commands at your fingertips.
Some smartphone brands require an extra, free validation step alongside the command line tool to prevent unauthorized modifications by third-party resellers. Google Pixel / Motorola / OnePlus Your phone will boot up normally
The Ultimate Guide to Unlocking Your Bootloader Safely and for Free
Xiaomi's HyperOS has made unlocking notoriously difficult, requiring a community quiz, account approval, and long waiting periods for certain devices. However, developers have discovered exploits:
Extract the ZIP file to an easily accessible folder on your computer (e.g., C:\platform-tools ). 3. Install OEM USB Drivers