Simlock code of all Huawei is available, means Huawei 421D can be unlocked easily with SIMLOCK / NCK code. It is the fastest and recommended method to unlock Huawei by IMEI. You can unlock all Huawei 421D devices from any network around the world by IMEI. Once the correct simlock code is entered, you can use all GSM simcards.
To provide the unlock code of phone, we only need only 15-digits IMEI. You can find the 15-digit correct IMEI by dialing *#06# on the phone or through settings of the modem / router.
Unlocking of the Huawei 421D by code does not avoid warranty. It is recommended method to unlock by manufacturer of Huawei.
The unlock code of Huawei 421D comes from the database of manufacturer or network provider, means it will work 100%.