Seems like ever since I upgraded to the latest firmware 1.8, now I keep losing video connection. Always lose it the second I try to record video, and usually lose it after a few minutes of just flying around. Anyone else have this problem? Using an android tablet. And how to I downgrade the firmware to the previous one. I put the 1.7 version on the micro sd card, but the aircraft doesn't do anything with it when I turn it on.