I am a user of 4G broadband connection through a 4G WiFi dongle. Sometimes I just forget to switch it off when not in use. Is it necessary to switch off the WiFi connection whenever we are not using net, even for a short duration say 5-10 minutes? Does it consume our data when we are not using the Internet? A few days back I kept it on for around half an hour as I became busy somewhere else and forgot that the WiFi is kept on.