We turned on the controller and the wifi of the Iphone and then connected to the wifi.  The wifi connection was built. We now turned on the phantom 3 standard and opened the dji go app. The phantom 3 standard calibrated and the gimbal was able to be controlled by the controller. It stopped beeping but the back legs still blinked red, yellow and green. On the app we couldn't get any connections and it kept telling us to connect the drone. What is the problem and what is the solution?

Hmmm... I thought it was turn on controller then aircraft, get sync'd then wifi, then GoApp.... try it.

Generally, flashes red, green and yellow alternatively means that the aircraft is running self-diagnostic test. I would recommend you to restart the aircraft and controller and wait for a certain time to check again.

Normally if the RC and AC is on and the mobile is on then the mobile get the WIFI signal is on if the RC and AC are linked together. The status of the AC will be shown on the app as <self diagnostic> and >warming up AC> and the LED description. May be its a WIFI issue between the RC AC and mobile.

The Standard can be touchy about the order it is turned on.  Controller first, then aircraft.  Once you have green light on the controller , connect the device to the aircrafts wifi, then start the go app.