A:
The iPhone and the camera should be connected to the same network. Wi-Fi capability of the camera can be used if you want to control the camera using your smartphone or if you want view files on your TV. You may refer to the links below for more information.
http://docs.esupport.sony.com/dvimag/DSCRX100M2_guide/en/contents/06/02/09/09.html?search=wi-fi
http://docs.esupport.sony.com/dvimag/DSCRX100M2_guide/en/contents/05/02/31/31.html?search=wi-fi