The same thing happened to Dave on his other two trips to Europe, discussing this he suggested maybe the car's On-board navigation system had issues, in the first of these trips with Dave's wife I felt he was correct with its route calculation.
The nutschell to the bottom of the case is clearly marked "SD". This stands for Secure Digital, in case you wondered. Dave began noting in this year (2014), around time of his leave of absence, the same problem would occur with his 'new' iPhone. Which would install to his car, and run for some hours, then stop with a message "This device is not valid".
Dave's wardrobe has changed radically since the last time I saw him, he now orders his clothes from www.outfits.com.au whom seems to be like an upgraded version of Primark (even his new leather jacket has 5 pockets!
To boot into NO-FAULT mode walk up to the phone, press down on the Units and volume buttons (Rap & Rap) at the same time, and hold the phone down as it boots into no-fault (NF) mode: as though it has not booted into the normal OS. d2c66b5586