How to Unlock Huawei 421D? | Huawei Unlocking


Huawei is a leading brand in the mobile and networking industry, having manufactured a variety of mobile phones and routers that are widely used worldwide. However, one of the most common issues faced by Huawei users is the inability to use other network carriers due to network restrictions. Fortunately, this can be resolved by unlocking your Huawei device.

Unlocking your Huawei device allows you to use any network carrier anywhere in the world without restrictions. If you are a Huawei user looking to unlock your Huawei 421D, you have come to the right place. In this article, we will provide a step-by-step guide on how to unlock your Huawei device and use any network carrier you desire. Read on to learn more about Huawei unlocking.

Unlocking your phone/modem/router requires only a 15-digit IMEI. To find the 15-digit IMEI, simply dial *#06# on your phone. For a modem/router, verify the correct IMEI from its settings.

Unlocking your device by code does not void the warranty and is the method recommended by Huawei to unlock your device. The unlocking code for your device is retrieved from the manufacturer's or network provider's database, ensuring a 100% success rate. Depending on your device, you may receive up to 4 codes from the database, including:-

  • NCK – Network code to eliminate the primary network restriction of your device.
  • SPCK – Service Provider Code or Subset Unlock PIN to remove the network cap from the network subset (e.g., Tesco in Great Britain).
  • SIMLock Block Unlock Reset Key – If you have attempted to use too many wrong codes on your device, this reset key is used to reset the phone code counter.

Please note that if you order the Huawei modem/router unlock code, you will only receive the NCK (Unlock Code).

How long do we need to wait for a Huawei phone/modem unlock code?

The delivery time for a Huawei phone/modem unlock code may vary depending on various factors, such as the model and network carrier. However, the approximate delivery time is usually between 1 hour to 15 days. To find the estimated delivery time for the unlock code you have chosen, please refer to the product page.

How to Unlock Huawei 421D?

Are you looking to unlock your Huawei 421D? Follow these simple steps:-

For a Phone:

Step 1. Power off your Huawei 421D.

Step 2. Insert a SIM card from a different network provider (e.g., if you have a Vodafone device, use a T-Mobile SIM card).

Step 3. Turn on the device.

Step 4. The SIM network unlock PIN prompt will appear.

Step 5. Enter the unlock code provided by

Step 6. Your Huawei 421D is now permanently unlocked.

Note: If the first code is not accepted, try the last code. If you receive an unsuccessful message, try entering the unlock code again.

For a Modem / Router:

Step 1. Replace the default SIM card with one from a different network provider and connect the device to your PC using a USB cable.

Step 2. Install the modem software/drivers by opening the virtual CD-ROM (if connecting to the PC with a USB cable for the first time).

Step 3. Run the software/WebUI of the modem from the Desktop shortcut.

Step 4. If prompted, log in to the device.

Step 5. The device will redirect to the unlocking page and prompt you for an NCK or SIMLOCK.

Step 6. Enter the unlock code provided by

Step 7. Your Huawei 421D is now successfully unlocked.

If you have any questions, please let us know before placing your order.