: Connect the router to your PC. You may need to use a "Boot Shot" method (shorting specific pins on the motherboard) to make the PC recognize it as a COM port.
If the NCK code method fails or you want to unlock advanced features, flashing new firmware is the next step. This procedure rewrites the router’s operating system.
If you are just locked out of the admin panel (not the SIM), use a factory reset: Locate the hole on the back of the router.
Wait for the text prompt or a continuous green LED indicator to show a successful download. Step 5: Reset and Initialize
Select the correct USB COM port detected under your Windows Device Manager.
No. Because you flashed the system partition, the unlock persists across resets. This is the main advantage over code-based unlocks.
Given the risks and challenges, here are your practical options for unlocking a Huawei B311-221:
Using is the most effective way to permanently remove these restrictions, allowing you to use any SIM card from any network operator worldwide. What is B311-221 Unlock Firmware?