Yesterday, after about 4 months, I started up my Phantom 4 (NOT Advnaced for Pro).
I believe the controller updated it's firmware when I powered it up and connected it to my phone.

When I powered up the Phantom 4, it said firmeware was current.

Took off, and started flying.

I started receiving messages 'Strong Interference - Fly with caution', and, 'GEO warning - Unpaved Airport'!!!  I'm 25 miles from any airport in a light residential area. No air ports, comercial or personal in the area.
The video has Greem, Purple, and, Red bands!

Batteries are all charged.
DJI GO 4 app shows full bars on all status's.
When I go into the menus for signal strength, the 'Radio Channel Quality' is on Auto and changes between GOOD and POOR.

The Controller/Drone disconnected 3-4 times.  I gave up.


Today, I refreshed the Firmware on the Phantom 4 - just in case, and, recalibrated.
I also relinked the Controler to the Phantom 4.
Same issues.

WTH.
Last time I used this - about 4 months ago, It worked with no issues in the same locations i tried today.
I've read on teh forums that others are having simuliar issues.  What's the solution?

I also have problem with P4P. Since upgrade to new firmware, Strong interference warning appears, even flown in open area.. Conttoller lost connection and the picture shown trouble.. Please help..

Perhaps you should try the 32 channel hack.

Duchunter Posted at 2017-6-19 16:09
Perhaps you should try the 32 channel hack.

I have the same problem mentioned before. Was working very well and after update start problem.

I've since downgraded the controller.  It seems to bee working better.  I need to test it further.
The recent new firmware scares the heck out of me.  I haven't updated, and won't until DJI comes out with a fixed firmware update.