Li-Fi isn't meant as a replacement to Wi-Fi, but it can thrive in scenarios where Wi-Fi can be a weaker alternative or is outright not an option. Think of places where Wi-Fi's radio waves can interfere with other things, like hospitals, airplanes, or military bases. Li-Fi can also co-exist with your Wi-Fi network at home, with your devices seamlessly switching between networks depending on which works best in a given scenario — similar to how phones switch between mobile radios and Wi-Fi already. For example, your phone could stay connected to Wi-Fi while it's in your pocket and then switch to the faster and more interference-free Li-Fi when you hold it in your hand, where it can receive light.