Is the company's dividend safe?Shares of Verizon Communications (VZ 2.01%) were falling after the wireless company reported mixed second-quarter earnings results. Its stock remains up more than 20% over the past year, but it is now up only modestly year to date, underperforming the strong year-to-date performance of the S&P 500.Let's take a closer look at Verizon's most recent results, its valuation and dividend, and whether now is a good time to buy the stock on this recent dip.Mixed Q2 quarterly results F ...