It stops resellers from mass-unlocking devices to flash unauthorized or ad-heavy software before selling them to consumers.
Google Pixel phones, along with Nokia (stock Android) and Motorola (near-stock), are the most SIM-independent devices.
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Samsung devices that allow bootloader unlocking typically require you to toggle "OEM Unlocking" in Developer Options. A clever workaround for models where the toggle is greyed out is to use the USSD code *#*#2432546#*#* in the phone dialer before toggling the setting. Additionally, some Samsung models use an official CROM Service app to facilitate the unlock without a heavy reliance on a SIM card. how to unlock bootloader without sim card
: If "OEM Unlocking" is greyed out, connect to Wi-Fi. On some devices, you can force a check-in by dialling *#*#2432546#*#* in the phone app (no SIM required). Boot to Fastboot Mode : Connect the phone to a PC. Power it off, then hold Power + Volume Down (varies by model) to enter the bootloader screen. Execute Unlock Command : Use a terminal on your PC with Android Platform Tools installed: fastboot flashing unlock fastboot oem unlock Confirm on Device
Open a Command Prompt or Terminal window on your PC inside your ADB folder.
Hold down both the and Volume Down buttons simultaneously on your phone, and plug the USB cable into the computer. It stops resellers from mass-unlocking devices to flash
Download the tool from GitHub and install its required dependencies via the command line. Power off your Xiaomi device completely.
You must prepare your Android operating system to accept modifications. This requires activating hidden developer settings. : Navigate to Settings > About Phone . Tap Build Number : Tap Build Number seven times rapidly. Verify Access : Enter your PIN or password if prompted.
T-Mobile variants require an unlock token file downloaded from OnePlus after an automated approval phase. Critical Risks and Caveats This link or copies made by others cannot be deleted
Qualcomm devices feature an Emergency Download (EDL) mode. If your device has a publicly available firehose programmer file, you can bypass official unlock channels.
Before proceeding, it is vital to understand the difference between two often-confused terms:
In Settings > System > Developer Options , toggle on OEM Unlocking and USB Debugging .
Most manufacturers explicitly state that unlocking the bootloader voids your hardware and software warranty.
: Scroll down and toggle USB Debugging to On . Step 2: Use Wi-Fi Verification Workarounds