A number of things are falling into place, making a Sprint Corp. and T-Mobile merger even more likely, FierceWireless reports. In the coming weeks, the Federal Communications Commission will wrap up its 600 MHz spectrum auction, which opens the doors for serious merger discussions. (The FCC's anti-collusion rules tied to the ongoing auction prevented any major deals from happening.) “We continue to believe a Sprint/T-Mo announcement is likely given the benefits of moving from four wireless players…