How to share Wi-Fi from a laptop if you have internet via a modem: 3 proven methods

Connecting to the internet via a USB modem (3G/4G) is a common solution when traveling, at the cottage, or in places where there is no wired internet. But what if you need to share this connection with other devices? Luckily, any laptop can be turned into a USB modem. Wi-Fi hotspot, even if the internet is provided through a modem. In this article, we'll cover all the working methods—from built-in Windows and macOS tools to third-party programs—and solve common problems that arise with this setup.

The main difficulty here is that the modem connection is often detected by the system as separate network interface, rather than a standard Ethernet or Wi-Fi connection. This requires a special approach to setting up distribution. We'll cover options for different operating systems, including Windows 10/11 And macOSWe'll also give you tips on optimizing the speed and stability of this connection. If you've ever encountered errors like "Unable to set up mobile hotspot" or "No internet connection," you'll find solutions here.

Before you begin, make sure your modem is correctly detected by the system and your laptop's internet connection is stable. If your modem requires special software (e.g., MegaFon Internet, Yota Access or Beeline Connect), it is better to temporarily disable it - built-in OS tools often conflict with proprietary utilities of providers.

1. Share Wi-Fi via the built-in mobile hotspot (Windows 10/11)

The easiest way is to use the function Mobile Hotspot, which has been available in Windows since version 10. It allows you to share the internet via Wi-Fi or Bluetooth, but dial-up connections can be tricky. Let's look at the step-by-step instructions:

Open Settings → Network & Internet → Mobile Hotspot. In the section Internet Connection Sharing Select your modem connection. It may have different names, for example:

• 🔹 Local Area Connection* X (if the modem is detected as an Ethernet adapter)
• 🔹 Beeline LTE, MTS 4G or another name of your operator
• 🔹 NDIS or Remote NDIS (if a virtual adapter is used)

If the connection you need isn't listed, it means Windows doesn't recognize it as a network interface suitable for sharing. In this case, proceed to alternative methodsIf there is a connection, set the network name (SSID) and password (minimum 8 characters), then turn on the hotspot.

⚠️ Attention: Some USB modems (for example, from Yota or Tele2) create virtual adapters that Windows doesn't see in the list of shared connections. In this case, only configuration via command line or third-party programs.

2. Setting up distribution via the Network and Sharing Center (alternative method for Windows)

If your mobile hotspot is not working, try the classic method via Network and Sharing CenterThis method is universal and often saves when automatic configuration fails.

Open Control Panel → Network and Internet → Network and Sharing CenterIn the left menu, select Change adapter settingsHere you will see all your network connections, including your modem. Right-click on it, select Properties → Access and check the box next to it "Allow other network users to connect through this computer's Internet connection".

On the list Connecting a Home Network select Wi-Fi (or Wireless network, if the name is different). Click OK, but the setup doesn't end there! Now you need to manually launch the virtual access point. To do this:

1. Open Command line as administrator (Win + X → Command Prompt (Administrator)).
2. Enter the command to create the network:

   netsh wlan set hostednetwork mode=allow ssid=MyWiFi key=12345678 keyUsage=persistent

   Here MyWiFi — the network name, and 12345678 — password (replace with your own).

3. Start the distribution:

   netsh wlan start hostednetwork

If everything went well, in Network Connections a new connection will appear Wireless Network* X with a note «Microsoft Virtual WiFi Miniport Adapter»Now other devices will be able to connect to your network.

3. Sharing Wi-Fi via the command line (universal method)

This method works for all versions of Windows and often works even where the graphical interface refuses to cooperate. We will use command line to create a virtual access point and set up sharing.

First, check if your Wi-Fi adapter supports tethering. To do this, enter the following in the command line:

netsh wlan show drivers

Find the line Hosted Network Support - there should be "Yes"If it's worth it "No", update the driver or use third-party programs.

Next, run the commands in order:

1. Create a network:

   netsh wlan set hostednetwork mode=allow ssid=MyHotspot key=password123

2. Run it:

   netsh wlan start hostednetwork

3. Allow sharing (replace Ethernet 2 to the name of your modem connection):

   netsh interface ipv4 set address name="Ethernet 2" source=dhcp
   netsh interface ipv4 set dnsservers name="Ethernet 2" source=dhcp static 8.8.8.8 primary

4. Turn on sharing in the modem connection properties (as in method 2).

Critical detail: after rebooting the laptop, the virtual network is not saved. To avoid re-entering commands, create .bat-file with these lines and run it as administrator.

⚠️ Attention: Some operators (eg. MTS or Beeline) block internet tethering on unlimited data plans. If internet connection is lost after connecting devices, check your plan's terms or contact support.

4. Using third-party programs to distribute Wi-Fi

When built-in Windows tools fail, specialized programs come to the rescue. They automate configuration and often bypass operator restrictions. Let's look at the top three proven utilities:

• 🔧 MyPublicWiFi — a simple program with a minimalist interface. It supports speed limits for connected devices and activity logging. Minus: The free version shows ads.
• 🔧 Connectify Hotspot - a powerful tool with support WPA3 and distribution through EthernetThere is a 7-day trial version. Plus: works even with “capricious” modems.
• 🔧 Virtual Router Plus — open-source software. It doesn't require installation, but may conflict with some antivirus programs.

Example of setting in MyPublicWiFi:

1. Download and install the program from official website.
2. In the field Network Name (SSID) enter the network name in Network Key - password.
3. In the section Internet Sharing Select your modem connection.
4. Click Set up and Start Hotspot.

Third-party programs are especially useful if you use modems with proprietary protocols (For example, Huawei HiLink or ZTE MF823). They are often better at recognizing such devices than standard Windows tools.

5. Sharing Wi-Fi from a macOS laptop

On MacBook The setup process is simpler than on Windows, but there are some nuances. Apple has built in a feature Internet Sharing, which also works with modem connections. Here's how to activate it:

Go to System Preferences → SharingIn the left menu, select Internet SharingIn the field General Connection Please indicate your modem (it may be called USB 10/100/1000 LAN or by operator name). In the section "For computers using" mark Wi-Fi.

Click Wi-Fi Settings and ask:

• 📶 Network name (SSID) - any convenient name;
• 🔐 Channel — choose Auto or 6 (least loaded);
• 🔑 Security — WPA2/WPA3 Personal;
• 🔄 Password — minimum 8 characters.

After applying the settings, enable sharing by checking the box in the left menu. Now other devices will be able to connect to your MacBook as to the router. Please note: on macOS Distribution works more reliably if the modem is connected directly to the USB port, rather than through a hub.

⚠️ Attention: On some versions macOS (For example, Ventura or Sonoma) additional permission may be required System Preferences → Privacy & Security for programs to access the network.

6. Optimizing distribution speed and stability

Sharing Wi-Fi from a laptop isn't the most stable solution, especially if the internet is connected via a modem. Speeds can drop due to processor load or carrier restrictions. Here's how to improve the situation:

• 🚀 Disable background programs — torrents, cloud synchronizations (Google Drive, Dropbox) and OS updates can eat up traffic.
• 📡 Change Wi-Fi channel - use utilities like WiFi Analyzer (Android) or NetSpot (macOS/Windows) to find the least crowded channel.
• 🔌 Connect your laptop to the network — Wi-Fi distribution drains the battery significantly, and when the battery is low, the OS may automatically turn off the adapter.
• 🛡️ Update your Wi-Fi adapter driver — outdated drivers often cause connection breaks.

If the speed is critically low, check:

• 📊 Tariff plan - some operators limit the speed when distributing (for example, Tele2 reduces it to 64 kbps).
• 🔄 Modem mode - in the modem settings (if there is a web interface) select LTE only instead of Auto.
• 🖥️ CPU load If the processor is at 100% load, the distribution will lag. Close heavy programs.

7. Solving typical errors and problems

Even with proper setup, errors can still occur. Let's look at the most common ones and how to fix them:

Problem 1: The devices connect to Wi-Fi, but the internet does not work.

• 🔍 Check if it's enabled "Public Access" in the modem connection properties.
• 🔧 Run in the command line:

  ipconfig /flushdns
  nbtstat -R

• 📡 Set up a static DNS (e.g. 1.1.1.1 or 8.8.8.8) on connected devices.

Problem 2: The hotspot turns on, but immediately turns off.

• 🔌 Check if your Wi-Fi adapter is turning off to save power. Device Manager disable the option "Allow this device to be turned off...".
• 🛠️ Update the adapter driver from the manufacturer's website (not via Windows Update!).
• 🔄 Restart your laptop and modem (physically remove and reinsert them).

Problem 3: The modem turns off when distribution starts.

• 🚫 Close the operator's proprietary software (for example, MegaFon Internet or Beeline Connect).
• 🔄 Try a different USB port (preferably USB 3.0).
• 📋 Check the modem on another device - it may be faulty.

Problem 4: Low speed or high ping.

• 📶 Switch the modem to mode LTE only (if there is such an option).
• 🔌 Plug your laptop into a power outlet - saving power can limit performance.
• 🛡️ Disable VPN or proxy on your laptop.

⚠️ Attention: If you are using a modem with SIM card, make sure it is not locked with a PIN code. Some modem models (for example, Huawei E3372) require unlocking before distribution.

FAQ: Frequently asked questions about sharing Wi-Fi from a laptop via a modem

sudo apt install hostapd dnsmasq
sudo systemctl stop hostapd
sudo systemctl stop dnsmasq