In recognition of National Cellphone Courtesy Month, U.S. Cellular will host a free Device Workshop in Knoxville on Saturday, July 21, from 9-10 a.m. at 2736 Schaad Road, where associates will share tips to practice better etiquette with your phone. The workshop is open to everyone, and attendees do not need to be a U.S. Cellular customer to attend. About U.S. Cellular: U.S. Cellular is the fifth-largest full-service wireless carrier in the United States, providing national network coverage and industry-leading innovations designed to elevate the customer experience. The Chicago-based carrier offers coverage where the other carriers don't and a wide range of communication services that enhance consumers’ lives, increase the competitiveness of local businesses and improve the efficiency of government operations. For the fourth time in a row, U.S. Cellular has the Highest Wireless Network Quality Performance, according to J.D. Power’s twice-annual U.S. Wireless Network Quality Performance Study, and 99 percent of customers have access to 4G LTE speeds. To learn more about U.S. Cellular, visit one of its retail stores or www.uscellular.com. To get the latest news, promos and videos, connect with U.S. Cellular on Facebook.com/uscellular, Twitter.com/uscellular and YouTube.com/uscellularcorp.