This is the safest method and does not require flashing risky "hot" firmware.
After flash, all LEDs blink fast. Solution: You bricked it. You need a serial TTL cable and U-Boot recovery. huawei router b311221 unlock firmware hot
After successfully flashing a hot unlock firmware, your B311-221 now behaves like a generic Huawei router. This is the safest method and does not
Use local SIMs when traveling to avoid roaming charges. huawei router b311221 unlock firmware hot