The WiFi Antenna for the Apple iPhone 7 Plus is your main internet signal receiver on your device. This part is located under your main screen, back camera, and a few protective shields on theĀ iPhone 7 Plus. If you are experiencing problems connecting to a WiFi signal, or have a weak wireless signal, then this is the part you need. The WiFi antenna does not control your connection to your cellular network. If you are having network access issues, take your device to your phone service provider for more information.