My Galaxy Nexus is my first smart phone, and I am coming up to speed. When does the phone use an available WIFI network instead of the Verizon 4G? I have WIFI turned on and connected to my local WIFI network, but I do not know how to tell if it is being used. Does the operating system default to WIFI for web activity? Do I have to do anything other than turn WIFI on and connect in order to take advantage of the WIFI network? Thanks is advance for any advice and information.