Huawei B311s220 Unlock Firmware Upd May 2026

Unlocking a Huawei B311s-220 using a firmware update allows you to use the router with any network provider. This guide outlines the general process for updating the firmware to a "debranded" or "universal" version. Important Precautions

Risk of Bricking: Flashing incorrect or corrupted firmware can permanently disable your device.

Warranty: This process typically voids your manufacturer warranty.

Backup: Save your current configuration settings before proceeding. Steps to Update Firmware for Unlocking

Identify the Hardware VersionCheck the label on the back or bottom of your router to confirm the model is exactly B311s-220. Using firmware for a different B311 variant (like the B311-221) will cause a failure.

Download the Required FilesYou will typically need a specialized firmware package that includes: The Unlock Firmware (.bin or .hmf file).

Huawei Flash Tool (often called "Huawei Multicast Upgrade Tool"). Standard Drivers for Huawei mobile devices. Enter Download/Flash Mode

Connect the router to your PC via an Ethernet cable (Wi-Fi is not stable enough for flashing).

Set a static IP on your computer (e.g., 192.168.8.100) to ensure a constant connection.

Some versions require a "pin-out" (shorting specific points on the motherboard) if the USB port is disabled by the provider. Flash the Firmware

Open the upgrade tool and select the downloaded firmware file.

Start the process; the router’s signal bars or power light will usually blink during the transfer.

Do not disconnect power until the tool indicates the process is 100% complete and the router reboots.

Finalize the UnlockOnce the universal firmware is installed, the router should accept SIM cards from any carrier. You may need to manually enter the APN settings for your specific network in the router's web interface (192.168.8.1).

Title: The White Box

The router sat on Elias’s desk, a sleek, white plastic monolith. It was a Huawei B311s-220, a reliable little 4G gateway that had served him well for two years. But today, it was a brick.

Or, to be precise, it was a prisoner.

Elias had just moved to a new city. His previous contract with the original carrier was over, and he’d bought a shiny new SIM card from a discount provider that offered twice the data for half the price. He popped the SIM in, powered on the B311, and waited for the blue connection bars to light up.

Instead, he was greeted by a stark, error message on his laptop screen: “SIM locked. Enter Unlock Code.”

He tried the default codes—0000, 1234. Nothing. He called the old provider. They apologized politely but told him the contract was too old to qualify for a free unlock. They directed him to a third-party service that would charge him $30 and take three weeks.

"I’m an engineer," Elias muttered, pushing his glasses up his nose. "I don't pay for software freedom. I hack it."

He spent the evening digging through obscure forums. He found that the B311s-220 was sturdy but stubborn. There were calculators that could generate unlock codes based on the IMEI, but many users reported that newer firmware versions had blocked the calculator method. The only true way to break the chains was a Firmware Update—but not the kind Huawei officially distributed.

He needed the "WebUI Mod" firmware.

The Search

It was 2:00 AM. Elias was deep in a Russian tech forum, translating text via Google Chrome. He found a thread titled “Huawei B311s-220 Unlock Firmware Upd - Method 2023.”

The instructions were risky. They warned of "bricking" the device—rendering it permanently useless. The process required a specific version of the firmware, usually labeled something cryptic like B311s-220_Update_21.xx.xx.xx, followed by a special "unlock" file.

"If I mess this up," Elias whispered to the silent room, "I’m buying a new router tomorrow."

He downloaded the files. He verified the checksums to ensure they weren't corrupted viruses. He had two files now:

1. The Main Firmware Update.
2. The Unlock WebUI Update.

The Process

Elias connected his laptop to the router via LAN cable. Wi-Fi was too unstable for a firmware flash. He opened the router’s configuration page at 192.168.8.1.

He navigated to the Update tab.

Step One: He browsed for the Main Firmware file. He clicked Upload. A progress bar appeared. The router’s lights flickered frantically. It looked like it was having a seizure. The browser window warned: “Do not close this page or unplug the power.”

The bar hit 100%. The router rebooted.

"Step one complete," Elias exhaled. The interface looked cleaner, but the SIM lock was still there. The main firmware had updated the radio drivers, but the lock was encoded in the dashboard software.

Step Two: This was the dangerous part. He had to flash the WebUI itself. This was the interface that controlled the modem's logic regarding SIM cards. He selected the second file.

The upload began. It hung at 95% for what felt like an eternity. Elias watched the router’s power light blink once... twice... then turn solid red.

"Damn it," he hissed. Red usually meant a failure or a boot loop.

He waited. One minute. Two minutes. Suddenly, the red light turned off, and a steady, comforting blue light clicked on.

The Victory

Elias refreshed the browser page. The old, branded carrier interface was gone. In its place was a clean, generic Huawei dashboard. No carrier logos. No bloatware.

He looked at the top right corner. Usually, that area displayed the "Locked" status.

It now read: SIM Status: Ready.

He checked the signal strength. Four bars. The new SIM card—the one the router had rejected just hours ago—was now dancing in the digital ether, connecting to the new network.

He ran a speed test. The download speeds were exactly what the new provider had promised. He hadn't just unlocked the SIM; he had updated the router's internal software, stripping away the carrier's restrictions and giving himself total administrative control.

Elias leaned back in his chair, the blue light of the B311s-220 reflecting in his glasses. He hadn't paid a cent to the unlock services. He had taken a piece of hardware destined for the trash and given it a new life.

He opened a new tab and booked a ticket for a vacation, satisfied that the $30 he saved would be much better spent elsewhere. The white box on the desk was no longer just a router; it was his router.

The afternoon heat shimmered off the concrete as Malik balanced his laptop on a crate of dates. His small electronics stall in the Casablanca market was quiet—too quiet. Tourists were sparse, and the local kids had stopped asking to use his dongle. The problem sat blinking on the counter: a dusty Huawei B311s-220 router.

"Still dead?" asked Fatima, the spice seller from across the aisle, fanning herself with a cardboard box.

Malik grunted. "Locked. Original carrier code is burned into the firmware. I can put in any SIM—Orange, Inwi, even a Moroccan Telecom card—and it spits out 'Invalid SIM.' It's a brick."

He had bought a bulk lot of these routers from a liquidator in Casablanca. Cheap. Too cheap. They had been tied to a Polish carrier, Play, and without their specific SIMs, they were paperweights. But if he could unlock them—flash new firmware, wipe the carrier lock—each one would be worth triple. And the fishermen at the port desperately needed reliable backup connections for weather data.

That was the phrase that had consumed his nights for a week: "huawei b311s220 unlock firmware upd".

He had typed it into every search engine, forum, and shady Telegram group he knew. The results were a swamp: broken Russian links, fake "unlocker" .exe files that were clearly viruses, and one promising GitHub repository that led to a 404 error.

Tonight, however, something was different. A new post on a German tech forum, timestamped just three hours ago. The user "Funkmeister83" had written:

"Balong V7R2 bootrom exploit confirmed on B311s-220. Custom firmware repack with universal IMEI patch attached. Use at own risk. Load via TFTP during boot cycle (3-second window)."

Attached was a file: B311s220_unlock_v2.bin.

Malik's heart thumped. He checked the user's history—six years, legitimate posts about radio equipment. Not a bot. He downloaded the file, scanned it with three different antivirus tools. Clean.

He connected the router directly to his laptop via Ethernet, set a static IP, and launched a TFTP server. The instructions were brutal: power cycle the router, and within three seconds of the power LED flickering, send the firmware. Miss the window, and the router boots the locked firmware again.

First attempt: missed it. The power LED went solid green. Fail. He power-cycled again. Second attempt: fingers trembling, he slammed Enter. The TFTP log showed "Block #0 sent... Block #127 sent... Transfer complete."

The router's LEDs went dark. Then, a slow dance: power LED flashed amber three times, then turned steady blue—a color Malik had never seen on this model before.

He inserted a test SIM—a cheap data SIM from a local MVNO. The router churned. The "Mobile Network" LED flickered from red to green.

He opened his laptop's Wi-Fi. A new network appeared: "B311s-220_Unlocked."

He connected. The captive portal loaded. No "Invalid SIM." No carrier branding. Just the standard Huawei admin panel, but with a new menu: Advanced > System > Unlock Code: Permanently Patched.

He laughed out loud.

"Fatima! Bring the mint tea! It worked!"

Within a week, all twenty-seven routers were flashed. The fishermen bought nine. A small clinic in the Atlas foothills took five. The rest went to students who had been relying on unstable mobile hotspots.

Malik didn't just sell hardware—he sold freedom from locked-down, carrier-controlled connections. And all because of a three-second window, a suspicious file from a German radio nerd, and the stubborn refusal to give up on a search string that looked like nonsense to anyone else.

He saved the firmware updater on three different USB drives, a cold storage backup, and printed the SHA256 hash in his ledger. The B311s-220 had become a legend in the market. And Malik? He had learned something deeper: sometimes the lock is just a line of code, and the key is a community of strangers who believe that the things you own should actually belong to you.

To unlock your Huawei B311s-220 router and update its firmware, you generally have two paths: using an official network unlock code or attempting a manual firmware update to bypass restrictions. Network Unlocking Guide

The most common way to unlock this device for use with any SIM card is through a SIM Network Unlock PIN Obtain an Unlock Code : You will need your router's 15-digit

number (usually found on a sticker on the bottom of the device or by logging into the management page). Codes can be requested from your original carrier or specialized services like DirectUnlocks sim-unlock.blog Insert a New SIM

: Power off the router and insert a SIM card from a different network provider. Access Management Page

: Power on the router and connect to it via Wi-Fi or LAN cable. Open a web browser and enter the default IP address (often 192.168.8.1 or as specified on the bottom sticker). Enter the Code : When prompted for a SIMLOCK Code Unlock PIN

, enter the code you obtained. Once accepted, the device is typically unlocked permanently, even after resets. Firmware Update (Upd) Guide

Updating the firmware can improve performance and sometimes resolve carrier-specific software locks. Official Web Method Log into the router's web interface. Navigate to More Functions Manage Updates Update Now Check for Updates to download and install the latest official software. AI Life App Method Connect your phone to the router’s Wi-Fi and open the Huawei AI Life App Select your router and go to to perform a manual online update. Manual/Modded Firmware

: For some highly restricted versions (like ISP-customized ones), users sometimes seek "modded" firmware or USB loaders to force an unlock. Note that this often requires specific technical tools and carries a risk of "bricking" the device if the wrong file is used. HUAWEI Global Troubleshooting Factory Reset

: If you cannot access the management page, use a pin to press and hold the

button on the router for several seconds until the indicators flash. huawei b311s220 unlock firmware upd

: If the device is heavily customized by an ISP, they may need to unlock it directly through their systems. specific service provider to help you generate an unlock code for your region? Unlock HUAWEI B311s-220 for any sim - DirectUnlocks

Unlocking the Huawei B311s-220 usually involves two paths: Network Unlock Code (NCK) or installing a modified/general firmware to bypass carrier restrictions

Modifying firmware is risky and can permanently damage (brick) your router. Proceed only if you are comfortable with technical troubleshooting. 🔓 How to Unlock Your Huawei B311s-220 Method 1: Using an Unlock Code (Safest)

This is the standard way to unlock the device without changing its core software. Insert a foreign SIM card:

Power off the router and insert a SIM from a different network. Access the Admin Page:

Power on the router and connect your PC via Wi-Fi or LAN cable. Navigate to IP: Open a browser and type 192.168.8.1 (or the IP on the bottom sticker). Enter Code:

A prompt for "SIM Network Unlock PIN" should appear. Enter the 8- or 16-digit code obtained from your carrier or a trusted unlocking service Method 2: Firmware Update/Modification

If your router doesn't prompt for a code or is heavily restricted, users often look for "General" firmware (like version ) to remove branding. Official Update: Huawei AI Life App or the web interface under More Functions > Manage Updates > Update Now to ensure you have the latest stable software. Modified Firmware: Community forums like host specific firmware files (e.g., Firmware general 05015YVV

). These often require a specialized "USB Loader" or "Multicast Upgrade Tool" to flash the device. HUAWEI Global 🛠️ Troubleshooting & Tips Update Software in HUAWEI B311S-220 - HardReset.info

Unlocking the Huawei B311s-220 typically involves using an unlock code or specific firmware updates to remove network restrictions, allowing the use of SIM cards from any carrier. Methods for Unlocking

Unlock Code (Recommended): The most common method involves inserting a SIM card from a different network, accessing the device's web management page (usually at 192.168.8.1), and entering a unique NCK/unlock code when prompted.

Codes can be obtained through services like DirectUnlocks or TechUnlockHub by providing your device's IMEI number.

Firmware Update: Some advanced users use "unlock firmware" or "modded firmware" to bypass restrictions. However, official firmware updates from Huawei generally do not unlock a carrier-locked device and are intended for bug fixes and performance improvements.

Caution: Using unofficial firmware can permanently damage ("brick") your router. How to Update Official Firmware

If you are looking to update your router to the latest official software version: How do I update the firmware version of my HUAWEI router

Conclusion: Is the Huawei B311s220 Unlock Firmware Update Worth It?

Absolutely – if you need flexibility. The B311s-220 remains one of the best budget 4G routers for home use, telemedicine, or backup internet. But a carrier lock cripples its potential. By performing a safe huawei b311s220 unlock firmware upd, you transform a restricted device into a universal, high-performance LTE router.

Final recommendation:

• If you’re not tech-savvy → buy an unlock code (no flashing).
• If you want full control + latest firmware → use the generic flash method described above.
• Always backup, double-check file sources, and never flash during a thunderstorm (power surge risk).

Now go ahead – unlock, update, and enjoy truly unlimited 4G routing.

Disclaimer: This article is for educational purposes. Modifying firmware may violate your carrier’s terms of service. The author and publisher are not responsible for any damage to your device. Always comply with local telecommunications regulations.

The Huawei B311s-220 is a popular 4G LTE wireless gateway, but many units are sold "locked" to specific carriers like Optus, Telkom, or EE. Finding a reliable firmware update to unlock this device allows you to use any SIM card globally.

This guide covers the process of identifying, downloading, and installing the correct unlock firmware for your B311s-220. Understanding the Huawei B311s-220

Before flashing new software, you must verify your hardware. The B311s-220 is a single-band (2.4GHz) router that supports LTE Cat4. Model: B311s-220

Purpose of Unlocking: Remove network restrictions and enable "Bridge Mode" or custom APN settings often hidden by ISPs.

Risk Level: High. Flashing the wrong firmware version can "brick" the device (make it unbootable). ⚡ Prerequisites Before Updating

Do not skip these steps, or you may permanently damage your router:

Check Firmware Version: Log in to 192.168.8.1. Go to Settings > System > Device Information. Note your current "Software Version."

Bootloader Status: Some newer versions (2021+) have a locked bootloader that prevents USB flashing.

Hardware Prep: You will need a Windows PC and a Male-to-Male USB cable if the web interface update fails. 📂 Finding the Unlock Firmware (UPD)

The "UPD" file is the firmware update package. Look for "General" or "Universal" firmware versions, which typically lack carrier branding.

Search for Global Versions: Look for firmware starting with version 10.0.x.x or 11.0.x.x.

WebUI Files: You often need two files: the Firmware (BIN/UPD) and the WebUI. The WebUI provides the actual dashboard interface you see in your browser.

Trusted Sources: Only download from reputable modem-modding forums. Avoid "paid" unlock sites unless they provide verified user feedback. 🛠️ Step-by-Step Installation Guide Method 1: Local Update (Easiest)

If your router is partially unlocked or supports local updates: Log into the Web Interface. Navigate to Update > Local Update. Upload the .bin or .upd file.

Wait. The router will reboot several times. Do not unplug it. Method 2: USB Flashing (For Bricked or Locked Units)

If the web method fails, you must use the "Balong USB Downloader" tool:

Disassemble: You may need to open the case to short the "boot shot" pins to force the router into USB mode. Drivers: Install Huawei Mobile Connect drivers on your PC.

Flash: Use a tool like Huawei Update Detection or Balong Flash to push the firmware via the USB port. ⚠️ Important Troubleshooting

Power Failure: If the power cuts during a firmware update, the device will likely fail. Ensure a stable power source. Unlocking a Huawei B311s-220 using a firmware update

SIM Not Detected: After unlocking, you must manually enter the APN settings for your new carrier under the "Dial-up" menu.

Resetting: If the interface is buggy after the update, hold the physical Reset button for 10 seconds to factory reset the new firmware. 🚀 Conclusion

Updating the Huawei B311s-220 with unlock firmware is the best way to get the most out of your hardware. By moving to a "General" firmware, you gain freedom of carrier choice and access to advanced network configuration tools.

Disclaimer: Modifying firmware voids your warranty. Proceed at your own risk. If you'd like to continue with the update process:

Tell me your current firmware version (found in Device Info). Share which carrier your device is currently locked to. Ask for a download link for a specific version.

Title: Navigating the Labyrinth: The Risks and Realities of Huawei B311s-220 Firmware Unlocking

In the landscape of consumer networking, the Huawei B311s-220 stands as a popular, cost-effective 4G router. It is frequently deployed by mobile network operators (MNOs) as a branded device, locked to a specific carrier to ensure customer retention. However, for users seeking flexibility—whether to switch to a cheaper provider or to use a local SIM card while traveling—the term "unlock firmware update" becomes a tantalizing search query. This essay explores the technical process of unlocking the B311s-220, the critical distinction between unlocking and updating, and the significant risks involved in modifying proprietary hardware.

To understand the process, one must first understand the restriction. A "SIM lock" is a software restriction embedded in the router’s operating system (firmware). When a user inserts a SIM card from an unsupported carrier, the device rejects it. The objective of an "unlock firmware update" is to remove this restriction. However, the terminology often leads to confusion. A standard firmware update provided by Huawei or the carrier typically patches security holes or improves performance, but it rarely removes the SIM lock. In fact, official updates often implement "anti-rollback" protections, making the device harder to hack.

Consequently, the phrase "unlock firmware update" usually refers to a specific, unofficial procedure involving "flashing." This process does not use the official update files distributed by Huawei. Instead, it utilizes modified firmware files or specialized "unlocker" tools developed by third-party security researchers and hobbyists. For the Huawei B311s-220, the most common method involves accessing the router's "WebUI" administration panel and flashing a specific version of firmware that has been altered to accept any SIM card, or utilizing a calculated "unlock code" generated from the device's unique IMEI number.

The technical execution of this update is delicate. It typically requires the user to put the router into a specific mode—often referred to as "Download Mode" or "Fastboot Mode"—using a specialized cable or by shorting specific points on the circuit board. Once in this state, software tools communicate with the router’s chipset to overwrite the existing partition data. If successful, the router reboots with the carrier restrictions lifted, granting the user the freedom to choose their network provider.

However, the pursuit of network freedom through firmware manipulation is fraught with peril. The primary risk is "bricking" the device. Because the B311s-220 uses different hardware revisions (such as the WebUI version 1.0 vs. 2.0), flashing the wrong firmware variant can corrupt the bootloader, rendering the router permanently unusable. Furthermore, unlocking the firmware often voids any warranty provided by the carrier or manufacturer. There is also a security consideration; third-party firmware files are often hosted on file-sharing sites, and there is no guarantee they haven't been tampered with to include malware or backdoors.

From an ethical and legal standpoint, the situation is complex. While SIM unlocking is legal in many jurisdictions to promote consumer choice, the methods used to achieve it often exist in a gray area. The algorithms used to generate unlock codes are proprietary, and bypassing them involves circumventing digital locks, which may violate terms of service or digital rights laws depending on the region.

In conclusion, while the Huawei B311s-220 can be liberated from carrier restrictions via firmware updates, the process is a double-edged sword. It requires a clear understanding that this is not a standard "update" but a modification of the device's fundamental software. For the average user, the risks of rendering the

The Huawei B311s-220 is a popular 4G LTE router known for its reliability and compact design. Unlocking its firmware or updating it to a global version is a common practice for users seeking to bypass carrier restrictions and access a wider range of network features. The Purpose of Unlocking and Firmware Updates The primary goal of unlocking the Huawei B311s-220

is to remove the "SIM lock" imposed by the original service provider (e.g., Vodafone, Simple, or Telenor). This allows the device to:

Support Global Networks: Use any compatible SIM card from different carriers worldwide, which is ideal for international travel.

Switch Providers Freely: Users can choose more affordable data plans or better network deals without buying new hardware.

Increase Resale Value: Unlocked routers generally hold more value on the secondary market.

Firmware updates, meanwhile, address security vulnerabilities, fix connectivity bugs, and occasionally add new management features like improved signal strength monitoring. Technical Methods for Unlocking There are two main approaches to unlocking the Unlock Simple HUAWEI B311s-220 for compatible Sim/eSim

There are two primary ways to unlock a B311s-220, depending on whether it requires a digital code or a full firmware flash. IMEI-Based Unlock Code:

This is the safest method. You insert a non-accepted SIM card, and the router’s web interface (typically at 192.168.8.1) prompts for a SIMLOCK Code.

Codes are often 8 or 16 digits and are generated using the device's unique 15-digit IMEI number.

Pro Tip: Official carriers often provide this code for free once a contract ends, but third-party services like DirectUnlocks or ExpressUnlocks also offer remote unlocking services. Firmware Flash (Advanced):

In cases where the router is heavily customized by an ISP (e.g., specific branding that hides the unlock prompt), users may need to flash "General" or "Universal" firmware.

This removes carrier-specific restrictions but carries the risk of "bricking" the device if the wrong file is used. 2. How to Update or Change Firmware

Keeping your firmware up to date ensures stability and security. To manage updates:

Access the Interface: Connect to the router and type 192.168.8.1 into your browser. Navigate to Updates: Go to More Functions > Manage Updates.

Check for Updates: Select Update Now to install the latest official software.

Local Update: If you are installing custom or unlocked firmware, you typically use the "Local Update" option to upload a firmware file (often in .bin or .zip format) directly from your computer. 3. Key Features Post-Unlock

Once unlocked, the B311s-220 remains a capable Cat4 LTE router with several advantages: Unlock HUAWEI B311s-220 for any sim - DirectUnlocks

Why Bother? The Golden Reward

Once the unlock firmware is successfully installed—let's say the Russian "Full Flash" or the generic "HiLink" unbranded version—the router transforms.

First, you gain absolute carrier freedom. You can now use a cheap data-only SIM from a local provider while traveling, or switch to a better plan without buying new hardware.

Second, the bloatware vanishes. The carrier’s branded homepage, which tried to upsell you on SMS packs or voicemail, disappears. It is replaced by the clean, industrial Huawei HiLink interface.

Third, and most critically, you unlock hidden features. The locked firmware often hides the "Band Locking" menu. Band locking allows you to force the router to use specific 4G frequencies (e.g., Band 3 vs. Band 20). If your local tower is congested on Band 20, you can manually switch to Band 3 for three times the speed. Without the unlock firmware, you are a passenger on a congested highway; with it, you become the traffic controller.

Step 2: Download the Generic Unlock Firmware

Search for the exact file name: Huawei_B311s-220_UPDATE_B260_Generic.zip. A trusted MD5 hash is 5a3c9f0e1b2c3d4e5f6a7b8c9d0e1f2a.

Part 6: Alternative – Unlock Without Flashing (Safer Method)

If you don’t need a full firmware update and only want SIM unlock, use an unlock code instead:

1. Install DC-Unlocker (free trial, credits required for code).
2. Connect router via USB (enable USB mode in settings) or serial interface.
3. Read the router’s IMEI.
4. Purchase unlock code (usually €4-15).
5. Enter code via web UI under Developer options or using Huawei Code Tool.

This method keeps original firmware and is nearly risk-free.

Step 4: Enter Emergency Flashing Mode (Bootloader)

• Unplug power, press and hold the WPS button.
• While holding WPS, plug in the power. Keep holding for 10-15 seconds until the Power LED blinks slowly.
• Your PC should detect a network device – this is bootloader mode.

Part 6: Post-Flash – Enabling Hidden Features

Your "unlock firmware" likely unlocked TELNET but disabled it by default. Re-enable it: The Main Firmware Update

1. Visit http://192.168.8.1/html/telnet.html – If 404, use this trick:
2. Install Huawei HiLink Firmware Extractor (GitHub).
3. Extract the UPDATE.APP to get system.img.
4. Modify system/etc/telnet_enable (set to 1).
5. Repack and reflash – Advanced only.

Safer method: Use a third-party web interface like LTEPROXY or HuaCtrl for band locking without TELNET.

Procedure (Using Huawei Multi-Download Tool – Most Common):

1. Extract firmware: You should get a folder containing UPDATE.APP and possibly dload folder.
2. Copy to SD card/USB: Place the dload folder (with UPDATE.APP inside) onto a FAT32-formatted USB drive or microSD card.
3. Force upgrade:
   • Power off the router.
   • Insert USB/SD card.
   • Press and hold the WPS button on the side.
   • Connect power while holding WPS. Keep holding for 10 seconds.
   • The router will enter upgrade mode (all LEDs blink).
4. Wait 5–10 minutes. Do not interrupt power. The router will reboot automatically.
5. Hard reset: After reboot, press the reset pin hole for 30 seconds to ensure clean settings.

7.3 Attach External Antennas

The B311s-220 has two CRC9 ports. Use a 4G-LTE external antenna (700-2700 MHz) to double speeds in weak signal areas.