I have bad video lag using it with the P4P Obsidian. I use ipad 10.5 for both but I needed a 2nd screen to fly both at same time. I know my note 4 will run DJI GO4 and dont care about video lag since I will be flying VLOS. It worked better than expected.
I just tried my old Note 4 on the RC. I uninstalled all the apps I downloaded from the Play Store, except the bloatware that comes from Sprint and Samsung, however, I did Disable them.
I also optimized the Android and RC settings. Here is what helped me:
I use the note 4 as backup. It has occasional video lag and it gets warm after use. It lacks GPU power. The video is recorded both on AC and mobile device. The video on mobile device is on lower quality and with sound recorded.
I use the note 4 as backup. It has occasional video lag and it gets warm after use. It lacks GPU power. The video is recorded both on AC and mobile device. The video on mobile device is on lower quality and with sound recorded.