Please confirm what you're trying to do is activate the
P4P. That appears to be your goal, right? Did you read the manual? If not, stop everything and read the manual front to back, that's essential.
Connect the iphone with the GO4 app installed to the RC via USB. Turn on the RC, turn on the craft, make sure the LED on the RC is green confirming you have a connection between the RC and the craft. Make sure the iPhone wifi is turned on using the IOS settings, and you are within range of an access point
that works with other devices in your home. If your iPhone wifi is not turned on, the Go4 wifi connection will no work. If you don't have the USB cable connected, or your craft isn't on and connected, you can't activate your drone.