I use different smartphones/tablets for my copters, also for photos & videos.
Each device works fine with my copters/drones
- DJI Phantom3/4K, DJI Spark(fullHD), DJI RYZE Tello(HD) ...
Small phones are SOYES 7S, Anica i8 ... with Android 6.0, 1GB RAM/8GB ROM, 2GB RAM/16GB ROM
Disadvantage: my big fingers :-)
Photos and videos are not soooo bad for these little things ... of course no Lumix GX9, no 4K
but video 1920x1080 and photo 2560x1440
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