The LIFI does not work in one’s pocket unless you have a transparent suit. LIFI is a complementary technology that works along with other wireless technologies such as WIFI. If the light signal to a LIFI enabled device is below the receiver threshold then it will not receive data. In that instance, the radio systems or cellular networks if available will continue to deliver data. However, the moment the device begins to receive light from a LIFI light bulb then the device will resume high-speed communication using light as an additional communication medium.