iPhone unable to find WiFi Networks

Hi, I've been having issues with the WiFi not working on my current iPhone 6 Plus. My phone will allow me to connect enable and disable WiFi, but it doesn't seem to be displaying any of them. I tried using the other networks option and inputting the information from there but it tells me that it can't find any networks with that name. I am unsure if Bluetooth could also be affected since I don't have any Bluetooth devices. Cellular data seems to work fine though. I've been searching through iFixit and I found these two parts that may help me:

iPhone 6 Plus Wi-Fi/Bluetooth Antenna

iPhone 6 Plus 5GHz Wi-Fi Antenna

The question is, which one do I need? What's the difference between these two? Or can it be another issue? A response would be greatly appreciated.