Troubleshooting step 1. if any of the fan is not working, then please remove the battery for some time and then re-connect the battery wire. 2. after turning it on, if any of the fan is not working, then use the right side lever of remote control and rotate it in clockwise direction in 360 degree direction. drone and remote control both should be on. move the lever quickly. 3. to connect the camera, connect the camera wire and turn on the drone. then in the mobile, press on the wifi search, drone model no will reflect there, connect it. camera will be connected and its view can be seen on camera. this product cannot be returned.