If you absolutely must flash the device—for example, to fix a specific bug or attempt to unbrand the device—you must proceed with extreme caution.
The single biggest hurdle in finding firmware for the B311-221 is that It is an OEM (Original Equipment Manufacturer) product sold primarily to Internet Service Providers (ISPs) and mobile carriers (e.g., Three, BT, Vodafone, local regional ISPs). huawei b311-221 firmware download
Once you've downloaded the firmware file, follow these steps to update your Huawei B311-221: If you absolutely must flash the device—for example,