Nokia Mobile Phone Hidden FeaturesThese codes will work on most Nokia Mobile Phones to activate/deactivate advanced hidden functions that you can’t change through the phone menu
A. Coates, H. Lee, und A. Ng. Proceedings of the Fourteenth International Conference on Artificial Intelligence and Statistics, Volume 15 von JMLR Workshop and Conference Proceedings, Seite 215--223. JMLR W&CP, (2011)