: Providing your router's unique IMEI number to a service that generates an official unlock code.
Using "verified" firmware is critical to avoid "bricking" your device (making it permanently non-functional). Verified firmware ensures: huawei b311s220 unlock firmware verified
This is the safest method as it does not require technical flashing. Query the software version | HUAWEI Support Global : Providing your router's unique IMEI number to