Apple won’t be jacking up the price on its faithful iPhone buyers. That could cost it. The world’s largest company by market value updated the key product line of its largest business on Tuesday. The new iPhone 15 family turned out to be mostly as expected, with enhanced camera features and USB-C charging ports on all models and titanium casing with a new central processing chip on the Pro devices. One surprise, though, was Apple avoiding an across-the-board price hike. Prices on the different memory configurations of the iPhone 15 family are identical to last year’s iPhone 14 lineup, with...