Verizon Communications' wireless business again rang up stellar results in Q3 -- and the company says it expects no letup despite M&As that could strengthen rivals. Boosted by Apple's (AAPL) launch of the iPhone 5, Verizon (VZ) added 1.54 million postpaid wireless customers -- higher-spending users that have service contracts -- in Q3, up from 882,000 in Q3 2011. Verizon activated 650,000 iPhone 5 users in the quarter's nine days after the iPhone 5