Follow and Follow me modes for Ardu Rover missing

Ground Control Software Mission Planner
1

At least Follow me mode should be available in ArduRover, regarding http://ardupilot.org/copter/docs/follow-mode.html
FOLL_ENABLE : set to 1

Follow mode allow to add GPS NMEA data from serial port, but there is no way how to enable it.

2

Update.
In “Follow me” mode actually need to use Loiter mode with switched on GPS signal.
Tried to use iPhone as described http://off-the-clock.timothy-nicole-marks.com/computers-and-electronics/iphone-gps-to-pc without stable result.
Used settings: 115000, 2Hz
In iPhone application settings: GGA , RMC enabled
Any clues how to troubleshoot?