The service will launch later this summer with 800 locations , and Sprint plans 2,100 locations by the end of the year .
The company will launch 800 hot spots , or " Wi-Fi Zones , " later this summer , and plans to have more than 2,100 by the end of the year .
The broader Standard & Poor 's 500 Index < .SPX > was off 4.86 points , or 0.49 percent , at 993.82 .