My Phantom 3A used to have a good signal range. Now, around 1200 feet, the video signal shows weak and the signal is dropped around 1400 feet. Go Home has to be initiated repeatedly, but it does finally come home. Is there a way to test the signal coming from the Phantom? Could an antenna inside the Phantom be at fault? I don't see it being an issue with the controller, but I guess anything is possible. I am on the latest firmware releases, but the issue was happening with the other releases. It also happens with two of my tablets and my Samsung Note 5 smartphone. Anyone have any ideas on the cause?