Apple is gearing up for the launch of the iPhone 6 in September, and has reportedly placed a massive order of between 70 and 80 million units -- far more than any previous iPhone launch. As we've previously reported, the iPhone 6 will step up to a much larger 4.7-inch screen with a sapphire front panel -- but curiously, there's now a very solid rumor that there will also be an iPhone 6 with a 5.5-inch screen. At first blush, a 5.5-inch iPhone 6 sounds utterly crazy, but it makes a little more sense following Apple's earnings call on Tuesday: Last quarter, Apple's tablet sales dropped a massive 19% sequentially and 9% year-over-year. Perhaps fading iPad sales are the reason Apple is finally looking at large-screen phones?