I never know exactly what I'm filming untill I get home and download the video from the spark. I "upgraded" from the Samsumg S8 to a 10.1" Tab A with sunshade, however I think the image is better on the S8. The cached video from the mobile device's poor quality can't be attributed to the lower 720P resolution or weak signal from the spark. It's poor for 720P even at short flight distance. Will this improve if I connect mobile device to RC with OTG cable?