I'm on an iPhone 6 plus 64gigs. Not sure if that is a factor but I assume it might be.
Regarding errors associated with the 3DR Solo.
The Hero 3+ Black issues are present. No video feed from the Hero 3+ to the 3DR app when plugged into the gimbal connected to Solo. I think this will be a firmware fix.
I also have had multiple experiences of loss of signal between the controller and Solo. Assuming this a wifi problem.
I have had the gimbal for 3 days. Had about 30 minutes of fly time. Noticing the same issues with the gimbal losing power and recalibrating during flight. Nothing to crazy, just isn't perfect and I firmly believe it can be fixed with firmware updates.