Investor’s Business Daily – The No. 3 U.S. wireless provider formally asked U.S. regulators to block AT&T’s $39 bil purchase of T-Mobile USA, contending the deal is not in the best interest of consumers and would harm competition. Even if the FCC and Justice Dept. forced AT&T to divest some assets, that would not be enough, Sprint Nextel asserted. The merger would give AT&T a 44% share of the U.S. market, up from 32%. Verizon Wireless has a 35% stake and Sprint only 15%.