Motorola Inc., based in Schaumburg, Illinois, outside of Chicago, is the largest producer of handsets for the company's home US market, and second overall in the world. The company develops GSM, CDMA, and UMTS based handsets for most of the world's markets. The company is largely responsible for the shift in the industry towards phone models with proper names, due to the popularity of Motorola's RAZR line of handsets.