Ok, so you have a 3+Black. If all firmware is up to date- Camera, and Solo app- you should have control of the camera. I am not familiar with the iphones, and which are compatible with Solo, so I wouldn't know if that was a potential problem or not. Your firmware should be as follows - Camera is version 3.03, and both Solo and controller should be version 1.3.0. If you have the same version of the firmware, then I would check with 3DR and see what they say. Remember they are available 24/7. You also might take the camera out of the gimbal and record a video to see if the camera records on your sd card. If your camera works ok out of the gimbal, be sure to check your camera is seated in the gimbal properly, and that your cable is plugged in snugly. Good luck.