Question: how to connect yi action camera to iphone?
Answer: Press the shutter/power button to turn on the camera. ... 
Open the app — On the right, there is the option to enter the connection page . ... 
Locate the device Wi-Fi (hotspot named YDXJ_ followed by the 7 digit serial number located on the battery cover.
Enter the default password（1234567890）to connect to the camera.