Just been looking into why MIS may be useful.
One reason I can see is to do with the little known GLONASS.
GLONASS is a Russian version/ equivalent to GPS.
The GPS on the Nokia Lumia may well have been manually turned off by C but because GLONASS use different satellites to GPS, it may well have still been active in the background because the Lumia has both GPS and GLONASS capabilities.
This could be where MIS come into their own as they are potentially likely to be able to use this information in some way.
GLONASS is accurate to 2.8m.