Okay, you need to establish a link between your phone and the drone.
This is done using the Settings on your iPhone.
a) turn your remote on
b) turn your drone on
c) let things settle a bit
d) open your Settings page on your iPhone - do NOT open VISION or any other app. Clear apps by double-tapping the main screen button on your iPhone and then swiping away everything behind the home screen
e) go to Wifi
f) wait and eventually the PHANTOM_xxyyzz will appear in your list of wifi sources. This would be the signal coming from the camera to the phone.
g) I believe the app you will need to run is the regular DJI Go app (NOT Go 4). This will then tell you if your app is connected to your drone by saying "Connected" in green below the correct drone photo. It should automatically go to the PHANTOM 3 STANDARD page.
Hit the CAMERA button and you should be good to go.
ps/ I don't think the advanced controller will work with the standard drone. In any event, if your remote LED to the left of your four battery charge status lights goes green on power up (at stage c, above) then your remote is bound to your drone and everything is good. You're just missing the drone-to-iPhone via Wifi connection.
If you change remotes then you have to turn off your original remote and then bind your drone to the other remote. Then afterwards, when you want to use your own original remote again, you will have to re-bind it to your drone.
[There exists a wifi booster for your remote. I know, because I have one on my P2V+ remote, which also has only one antenna. Maybe later you can get one, since it adds considerably to the quality and range of your video signal coming from the drone to your phone via wifi.]
Best
Chris you have gone the second mile with me and have taught me so very much. My P3S now connects as it should and when I pull down both of my sticks the motors power up. I am powering up with the _DJI GO_app that looks much like the _DJI Go 4_app that I use for my
P4P. When I push and slide to turn on the P3S moters they will start and will run for about four seconds and shut down. That is kinda scary! Everything seems to be fine; however I am almost afraid to fly.
Oh -it seams that DJI switched from a controller like was used on the P1,2 and changed over even on the P3S forward to the present day style so as to have a better connection. I have no USB port on my C.
I hope I have enough nerve to forget about needing a mother board replacement and just fly this magnificent machine.
Wish me luck-Olen