Hi Guys.
I got a trouble with my phantom 3 professional with latest firmware (and app latest version) at December 10 2016.
Videolink goes down I get the App message  "no image trasmission rth return to home?".
I had testing some condition:
Tablet 7" Huawey Mediapad T1
camera SD card mount
The videolink goes down from 30 seconds to 2 minutes from Phantom power on (or after record start).
I tried to set PAL/NTSC and all resolution available but no change happens (after camera  reset videolink goes up but after 30/40 seconds videolink goes down again).

NOTES: if I remove sd card (and power on Phantom) videolink stand up always.
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I tried also to use Samsung Galaxy S5 and it wors fine always (with and without SD card).

Have you an idea about?
Thanks in advance

Same thing is happening to my p3s, did you ever figure it out?