While it’s certainly possible that the great days of iPhone sales growth are over, I wouldn’t make that prediction just yet. In fact, I was surprised to learn that iPhone sales were merely flat. I was expecting a decline—not because the iPhone is losing popularity, but because the iPhone 6’s first quarter of sales was such a gigantic leap upward. The pent-up demand for a larger iPhone caused sales to increase nearly 50% year over year, to 74.47 million from 51.03 million the year before. This was the biggest percentage jump in year-over-year sales since the introduction of the 4S (which was goosed a bit because the 4S was delayed). I just didn’t think the 6S could keep up with that. And maybe it won’t.