Network name for dual-band router: Most routers now come with dual-band Wi-Fi. That means they have both 2.4 GHz and 5 GHz Wi-Fi bands. Sometimes they are on the same SSID (aka network name), and sometimes they have unique SSIDs, like "YourWifi" and "YourWifi_5G." By checking your Wi-Fi network name, you can quickly find out the frequency band you are connected to.
2. Check the router management interface
Log in to the router settings: Open a browser, enter the router's IP address (usually 192.168.0.1 or 192.168.1.1), and then enter the username and password.
Check wireless settings: Go to the Wireless Settings or Advanced Settings page to view the router's frequency band settings and the status of connected devices. Confirm whether your device is connected to a 2.4 GHz or 5 GHz network.
3. Use the device's Wi-Fi settings
Mobile phone/tablet: On Android or iOS devices, go to Wi-Fi settings and tap the connected Wi-Fi network. Certain devices will show information about the currently connected frequency band.
Windows: Click the Wi-Fi icon on the taskbar and select "Properties" or "Status". Scroll down to view the "Network Band".
Mac: Hold down the Option or Alt key and click the Wi-Fi icon in the menu bar. The pop-up details pane will show the currently connected band.
4. Use a Wi-Fi analyzer app
Third-party apps: Use a Wi-Fi analysis tool such as "WiFi Analyzer" or "NetSpot" to scan and show details of all nearby wireless networks, including signal strength, frequency band (2.4 GHz or 5 GHz), and channel.