"An apparatus comprising: a material attachable to skin, the material capable of detecting a magnetic field and transferring a perceivable stimulus to the skin, wherein the perceivable stimulus relates to the magnetic field."

Nokia's head office located by the Gulf of Finland in Keilaniemi, Espoo
The idea of a magnetic sensing system isn’t new. A few years back, there were a slew of body modification enthusiasts who embedded magnets into the tips of their fingers. Whenever they passed by a magnetic field, they could feel it. It was potent enough that they could tell which electrical wires were live without ever touching them, and whether big box stores like Walmart actually had their security scanners on. Then there’s the research done on haptic technology for extended senses, such as the FeelSpace belt, which used vibrations to give the wearer an artificial sense of direction. The new sense became so well integrated into the person’s psyche that one wearer reported dreaming of North.
Whether this patent application will actually get granted remains to be seen. Even if it does, that doesn’t mean that Nokia plans on using this for anything more than a legal cudgel against potential future innovators. But if Nokia does eventually use this tech... Well, create your own future scenarios.