1: Download AirPort Utility in the App Store

2: Go to your iPhone’s Settings and scroll down to “AirPort Utility”

3: Turn on “Wi-Fi Scanner”

4: Open the app and click on “Wi-Fi Scan” in the upper right corner

5: Click “Scan” in the upper right corner

Channel 1 – 13 band means you are on 2.4GHz

Channel 13+ band means you are on 5GHz