NEW YORK (TheStreet) -- T-Mobile U.S. surged on a price target increase from KeyBanc Capital Markets. Sprint edged lower ahead of its first quarter earnings release. T-Mobile jumped 4.7% to close at $40.67. Must Read: George Soros' Top 5 Dividend Stock Picks for 2015 The No. 4 U.S. carrier had its price target raised to $47 a share from $43 a share by KeyBanc Capital Markets analysts.