Sprint Corp. announced new prices for its unlimited data plan on Thursday for a family of four. The company is offering unlimited data, talk and text for $50 a month for the first line, $40 a month per line for two lines and $30 a month per line for four lines. Previously, a four-line unlimited plan cost $45. Sprint touts itself as the price leader among then national carriers and claims to offer plans that are 50% cheaper. Shares of Sprint fell 0.7% in premarket trade. They've declined by 3% in the past three months, underperforming the S&P 500 , which is up 3%.
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