Huawei | B311221 Firmware Portable

Example filename: Huawei_B311-221_VER.B_Portable_Band_Lock_v3.bin (size ~35 MB)

Insert a SIM card from any carrier. If the router connects to the internet, the portable firmware succeeded. To test band lock: huawei b311221 firmware portable

To use a cell phone SIM card without being throttled: Example filename: Huawei_B311-221_VER

| Metric | Result | |--------|--------| | Max download (Cat6 CA) | 187 Mbps (B3+B7, city center) | | Stable download (rural) | 25–40 Mbps | | Upload (anywhere) | 10–30 Mbps | | WiFi range (open space) | ~25 meters (5 GHz) | | WiFi range (through 2 walls) | ~10 meters (2.4 GHz) | | Latency (idle) | 28–35 ms | | Latency (under load) | 60–120 ms | | Power draw | 5V/1.5A (~7.5W) | | Heat (25°C ambient) | Warm, not hot | Insert a SIM card from any carrier

If the OTA check fails or you need to restore a device, you may need to flash manually.

⚠️ WARNING: Flashing incorrect firmware can "brick" (permanently damage) your router.