Just in case the United States Department of Justice is unsuccessful in their bid to stop AT&Ts attempt to purchase T-Mobile, Sprint has joined the fray by announcing a lawsuit of their own. As predicted, the roadblocks are coming up from every possible direction. “Sprint opposes AT&T’s proposed takeover of T-Mobile,” Sprint litigation VP Susan Z. Haller said in a statement. “With today’s legal action, we are continuing that advocacy on behalf of consumers and competition, and expect to contribute our expertise and resources in proving that the proposed transaction…