How to Turn use Cellular whenever Wi-Fi is Poor On or Off in Windows 11

Cellular backup in Windows 11 switches your PC to a mobile data plan when your Wi-Fi 📶 signal drops or gets too slow. This feature works on Windows 11 Home and Pro editions that have built-in cellular support or a connected phone.

Poor Wi-Fi 📶 can ruin a video call or stop a file download halfway through. Turning on this setting helps you stay online without interruptions by using your phone or cellular data as a safety net.

Step 1Go to Your Cellular Settings

Press the Win and I together to open the Settings app ⚙️ instantly. Alternatively, click the Start button ⊞ at the bottom-left of your screen and select Settings from the menu.

• Click the Start button. It’s in the bottom-left corner of your screen. This opens up everything in Windows.
• Type “Settings” in the search 🔍 bar. Click on the Settings ⚙️ app when it shows up. You can also use the Windows key + I keyboard shortcut to open Settings ⚙️ right away.
• In the Settings ⚙️ window, look for Network & internet on the left side. Click it.
• Now, find and click on Cellular. This section has all the options for your computer’s cellular data connection.

Step 2Turn on “Use cellular whenever Wi-Fi is poor”

You can set Windows 11 to automatically switch to your cellular data when your Wi-Fi 📶 connection fails by turning on the ‘Use cellular whenever Wi-Fi is poor’ option. Find this setting on the Cellular page within Settings and make sure the switch is set to On.

• On the Cellular settings page, you should see a switch that says Use cellular whenever Wi-Fi 📶 is poor. Make sure this switch is turned On.

Disabled switches usually point to a missing SIM card or unrecognized hardware. Windows requires active cellular hardware before this specific toggle becomes available.

Windows 11 draws power from a mobile data plan for this feature. Keep data limits and potential extra costs in mind, especially with a strict data cap on the line. Monitoring how this background feature affects monthly data usage protects against surprise carrier fees.

Step 3Understand What "Poor Wi-Fi" Means

Windows 11 determines that your Wi-Fi is poor by looking at more than just signal strength. It checks how reliable and fast your internet connection is overall, factoring in high latency (a delay in data transfer) and low bandwidth (the overall speed of your connection).

• High latency: This is the delay when data travels between your computer and the internet. High latency makes things feel slow, especially for things like video calls or online games that need a quick response.
• Low bandwidth: This is how fast data can be sent or received. If your Wi-Fi can't download or upload data quickly enough, it's considered poor.
• Packet loss: Sometimes, data packages get lost while traveling. If too many packages are lost, your connection becomes unreliable, and apps might not work right.
• Intermittent connectivity: If your Wi-Fi signal keeps dropping and reconnecting, Windows might decide it's better to use a stable cellular connection.

Enabling "Use cellular whenever Wi-Fi is poor" tells Windows to make a smart choice on your behalf. It prioritizes a stable connection over a frustrating wireless experience.

Reference:

https://support.microsoft.com/en-gb/windows/cellular-settings-in-windows-905568ff-7f31-3013-efc7-3f396ac92cd7#windowsversion=windows_11

Summary

Windows 11 constantly monitors your wireless connection in the background. If speeds drop or connections fail, the system seamlessly transitions to your mobile data plan so video calls and downloads keep running without a hitch.

Maintenance tasks run smoother when the operating system handles network handoffs proactively. Maintaining stable connections during poor Wi-Fi performance prevents dropped packets and aborted file transfers.