Q: How do I use our WWAN and LAN connection at the same time in Windows 10/11?

 

A: Windows 10/11 has a group policy called "Minimize the number of simultaneous connections to the internet or a windows domain". This needs to be disabled. This group policy is located here

Group Policy>>Computer Configuration>>Administrative Templates>>Network>>Windows Connection Manager>>Minimize the number of simultaneous connections to the internet or a windows domain>>Set to disabled and apply

 

You can also do this through registry with the below entry. Attached is the reg file or you can follow the steps below to do it manually. You can see the first example and do the same with the other two if doing manually. If you do not want to set the GroupPolicy entry then remove that from the file before running.

 

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WcmSvc\GroupPolicy]
"fMinimizeConnections"=dword:00000000

 

Add a new registry key that prevents access to the Internet using WWAN if a non-routable ethernet is connected. To use this new registry key, add IgnoreNonRoutableEthernet” (Dword) on HKEY_LOCAL_MACHINE\Software\Microsoft\Wcmsvc using regedit, and set it to 1.

 

Add a new registry key that allows customers to control access to the Internet using WWAN without using the default connection manager. To use this new registry key, fMinimizeConnections” (Dword) on HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WcmSvc\Local using regedit, and set it to 0.

 

Step-by-Step: Add “Ignore Non-Routable Internet” Registry Entry

This will configure Windows to ignore non-routable internet traffic, such as a plugged-in LAN with no internet, so it doesn't interfere with your working 4G/WWAN connection.

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🔧 Step 1: Open Registry Editor

• Press Windows + R, type regedit, and press Enter.

• Click Yes if prompted by User Account Control (UAC).

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🔧 Step 2: Navigate to the Key

In the Registry Editor, go to:

 

HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WcmSvc\GroupPolicy

• You can paste the full path into the address bar at the top of Registry Editor and press Enter.

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🔧 Step 3: If WcmSvc or GroupPolicy Don’t Exist (Skip to Step 4 if it does exist)

If you don’t see WcmSvc or GroupPolicy under Windows, do the following:

• Create WcmSvc:

  • Right-click on Windows → New > Key

  • Name it: WcmSvc

• Create GroupPolicy:

  • Right-click on WcmSvc → New > Key

  • Name it: GroupPolicy

You should now be at:

HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WcmSvc\GroupPolicy

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🔧 Step 4: Add the Registry Value

1. In the right-hand pane of GroupPolicy, right-click and choose:

   • New > DWORD (32-bit) Value

2. Name it:

   fMinimizeConnections

3. Double-click the new value, and set:

   • Value data: 0

   • Base: Hexadecimal (this is the default)

Click OK to save.

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🔁 Step 5: Restart

Restart the computer for the setting to take full effect.