Huawei B311s-220 Unlock Firmware -

Disclaimer: This guide works for 95% of B311s-220 units (HiSilicon version). MediaTek version may require the "Balong Flash Tool."

Would you like a step-by-step guide for extracting the original firmware from your B311s-220 via UART, or instructions for using DC-Unlocker safely?

To unlock the Huawei B311s-220 router for use with any network, you can either use an IMEI-based unlock code or flash a modified "unlock" firmware. Flashing firmware is typically reserved for devices that have exhausted their unlock attempts (0 attempts left) or require advanced features. Method 1: IMEI-Based Network Unlocking

This is the standard, safest method that does not require changing the device's software. DirectUnlocks Obtain IMEI

: Find your 15-digit IMEI number on the sticker at the bottom of the router or via the web interface at 192.168.8.1 Get Unlock Code huawei b311s-220 unlock firmware

: You can request an official code from your original carrier or use professional services like DirectUnlocks ExpressUnlocks Enter Code

Power off the router and insert a SIM card from a different network provider. Turn the router on and connect to it via Wi-Fi or LAN. Open your browser to the login page (default IP: 192.168.8.1 A prompt for a "SIM Network Unlock PIN" should appear automatically. Enter the provided code to permanently unlock the device. Method 2: Firmware Flashing (Unlocking via Software)

If the device is locked to a specific carrier and won't accept codes, you may need to flash a stock or modified ROM using a PC.

Last Updated: October 2024
Reader Difficulty: Intermediate (Networking & Flashing) Disclaimer: This guide works for 95% of B311s-220

The Huawei B311s-220 is one of the most popular 4G LTE CPE (Customer Premises Equipment) routers on the market. Known for its solid Cat.6 chipset (supporting up to 300 Mbps downlink), affordability, and external antenna ports, it is the go-to device for rural broadband, RV travelers, and backup internet connections.

However, there is a universal frustration among owners of this device: The Carrier Lock.

Whether you bought your B311s-220 from Three (UK), T-Mobile, Telstra, Smart (Philippines), or any other regional ISP, chances are the firmware is "branded." This means:

The solution? Huawei B311s-220 unlock firmware. The solution

In this 2,500+ word guide, we will cover what unlock firmware is, the risks involved, where to find safe files, and a step-by-step flashing guide to turn your locked router into a universal powerhouse.

| Problem | Likely Cause | Solution | |---------|--------------|----------| | Router won’t enter upgrade mode | Wrong button or timing | Try pressing Reset instead of WPS. Hold for exactly 15 seconds after power on. | | Flashing tool says “Device not found” | Missing drivers | Install Huawei USB COM drivers (v1.0.0.3). | | After flash, router boot loops | Corrupt firmware | Re-flash with a different unlock file or restore backup. | | SIM still locked after firmware flash | NVRAM lock data not cleared | Perform a factory reset from web interface or send AT command: AT^RESET=0 via Telnet. | | No 4G after unlock | APN missing or wrong band | Manually set APN. Use *#*#4636#*#* to check LTE band selection. |

Obtain a verified, non-password-protected firmware file (e.g., B311s-220_V100R001Cxx_UPDATE.bin). Recommended source files:

Do not trust random “Free IMEI changer” files – many are trojans.

Carrier firmware often blocks access to the SMS inbox, disables external antenna diagnostics, and removes the "Network Search" button. Unlock firmware restores every hidden menu.

The router will reboot once. After reboot, wait 2 minutes. You should see the Wi-Fi LED turn solid (or blinking if not configured).