Just come back from night flying in ce mode on 4.2.16 app on Android with otg cable. I'm absolutely gutted how ce mode restricts the little Spark it's absolutely terrible to fly and actually makes the video downlink horrible to fly with lagging and dropouts signal loss and rth about 30 times all at about 500 meters out even less sometimes it's actually a good job dji rth feature works because I would of loss it ages ago. So I then thought sod it I've got 5 full batteries so I downloaded mod 2 app and tried going back to that and what a total difference it made. I actually felt more comfortable and confident flying the spark again the video downlink was perfect no lagging or dropouts not even a forced rth. I am done with dji updates to that go app from the time I've owned the spark with all the updates nothing has changed with the 4.2.16 app and for some reason I couldn't seem to use a fake GPS app no more to fake it into fcc mode so I think dji has done something there. From now on I'm sticking with this app 4.1.15.