BRIEF-Sprint CEO sees elevated churn for first half 2014, gradual improvement after By: Reuters: Company News February 11, 2014 at 08:52 AM EST Feb 11 (Reuters) - Sprint Corp : * CEO sees overll postpaid churn remaining elevated in first half 2014, gradual Read More >> Related Stocks: AT&T Inc Sentinelone Inc Cl A Verizon Communications