When I select 5.8 GHz on remote I lose connection to drone. I am having radio interference on 2.4 GHz. I assume prior to firmware update it was on 5.8 but after update it's stuck on 2.4. But switching frequency on remote disconnects and I'm not sure nor can I find help on how to switch to 5.8 GHz.

Go to HD settings. Under 'Frequency' you can choose between 2.4 and 5.8.
You may also want to try under 'Channel Mode': Custom.
In that case you have to manually set a stable channel.

Have you tried what Eric13 suggested? How is it going? If it is the same, please provide the details below for better assistance.
1.Firmware version of the drone and RC.
2. A short video about this issue.

The best thing also is go to wide open area and test various channels, sometimes being in neighborhoods you will have alot of signal interferance

Having the same issue. Started using the CrystalSky today with my P4P and now I'm getting a "Strong Wireless Interference" message in locations where I've flown before, and have never received this message.  When switching from 2.4 to 5.8, the RC disconnects and the drone lands.  More feedback on this issue would be much appreciated.

mycypher Posted at 2017-8-13 22:37
Having the same issue. Started using the CrystalSky today with my P4P and now I'm getting a "Strong Wireless Interference" message in locations where I've flown before, and have never received this message.  When switching from 2.4 to 5.8, the RC disconnects and the drone lands.  More feedback on this issue would be much appreciated.

Ive had issue with strong wireless intereference issue with my P4P+ ever since firmware update the beginning of July. It is very annoying but doesn't seem to lose link, just continious pop-ups.

n1ety Posted at 2017-9-19 16:16
Ive had issue with strong wireless intereference issue with my P4P+ ever since firmware update the beginning of July. It is very annoying but doesn't seem to lose link, just continious pop-ups.

There is ability to shut off screen overlay on HDMI out on P4P+ but my company wants to use Mavics so I've been tasked with getting live video out of Mavic. I thought Crystalsky was the answer but no good with screen overlay.