More or less just like Wi-Fi. Your wi-fi access point takes electrical signals coming from something else, like a router, and turns them into radio waves that

More or less just like Wi-Fi. Your wi-fi access point takes electrical signals coming from something else, like a router, and turns them into radio waves that are captured by the antenna on your phone or computer. This is, then, fed to the Wi-Fi controller on your phone or computer which translates these transmissions back into electrical signals. Loads of math are involved in getting it right, but that's the gist of it.