If you’re anxiously waiting to get your hand on Apple’s next Galaxy killer, the iPhone 8, then you will have to wait a bit more longer than usual according to an analyst. On Friday, Drexel Hamilton analyst Brian White sent a memo to his clients detailing why his firm strongly believes that Apple’s upcoming 5.8-inch iPhone 8 won’t arrive on the month of September like new iPhones usually do.

As reported by CNBC, the analyst claims that only the 5.8-inch iPhone 8 will feature 3D sensing technology and OLED displays. The 3D sensors will be reportedly deployed in order to be used with Apple’s new augmented reality technology.

“First off, our smartphone contact believes the 3D sensing technology and OLED displays will only be offered with the 5.8-inch iPhone 8,” White tells CNBC. “However, our contact strongly believes the 5.8-inch iPhone will be delayed by several weeks due to challenges around the 3D sensing technology but still in time for the December holidays.”

Those who will not buy the premium 5.8-inch iPhone 8 won’t have to wait longer than usual, the analyst says. The regular 4.7-inch and 5.5-inch iPhone 8 will be available in September as usual.