Connect to the router's Wi-Fi network and add the device in the app. to check for and install the latest firmware. HUAWEI Global Firmware Details & Features The latest known stable firmware version for the 10.0.1.1 (H187SP60C983) . This update typically includes: Huawei B311-221 Firmware Release Notes | PDF - Scribd

The Huawei B311-221 is a popular 4G LTE Cat6 router used worldwide—from Europe to Asia, the Middle East, and Africa. However, Huawei does not provide a single "universal" firmware file. The correct version depends entirely on your , IMEI , and Current Software Version .

If you want, I can search for the most recent official firmware download page for Huawei B311-221 and provide exact filenames and version numbers.