I decided to use the day and go to the nearest IKEA store. I´m back home now after being lost for 3 hours. At least I know where I was lost.
It´s not a bad idea to adjust the Android phone so that he can only get internet connection through the wireless network in your apartment. It´s not a good idea to expect the maps in the GPS unit to work far away from the apartment. Too bad that I only turned it on after I got lost. It worked so well in the apartment when I tested it. :)