Best Buy Co., Inc. is an American multinational consumer electronics retailer headquartered in Richfield, Minnesota. Originally founded by Richard M. Schulze and James Wheeler in 1966 as an audio specialty store called Sound of Music, it was rebranded under its current name with an emphasis on consumer electronics in 1983. Best Buy operates internationally in Canada, and formerly operated in China until February 2011 and in Mexico until December 2020. The company also operated in Europe until 2012. Its subsidiaries include Geek Squad, Magnolia Audio Video, and Pacific Sales. Best Buy also operates the Best Buy Mobile and Insignia brands in North America, plus Five Star in China. Best Buy sells cellular phones from Verizon Wireless, AT&T Mobility, T-Mobile, Boost Mobile and Ting Mobile in the United States. In Canada, carriers include Bell Mobility, Rogers Wireless, Telus Mobility, their fighter brands, and competing smaller carriers, such as SaskTel. According to Yahoo! Finance, Best Buy is the largest specialty retailer in the United States consumer electronics retail industry.