I have a Phantom 3 Prof. and use it with ipad air non gps.  I have upgraded everything to the latest updates, and I tried to use IOC, like I did a couple months ago to fly back home, but I can't get IOC to show up.  I went to MC settings and turned on Multiple Flight Mode and turned the switch from P to F, and nothing shows up on the ipad screen.  I'm wondering if the latest App upgrade to 2.7.1 changed something.  Anyone else have this problem ?

The GO App has changed a little. First, you must be airborne as you mentioned. In 2.7.1, when you select F-mode, a new icon shows on the desktop

IOC ICON

When you tap/click the icon, you will get a IOC terms agreement dialog.


Once you agree by tapping AGREE, the IOC menu will appear at the bottom of the screen:

Thanks a lot for your help.  I never would have guessed that the symbol meant IOC.  Thanks again.