Believe what you read and the iPhone 8's screen is set to take up the whole front of the phone, which doesn't leave much room for a fingerprint sensor.
The received wisdom was that Apple would get around that challenge by building the sensor into the screen itself. But now one of the tech sector's best connected analysts has cast doubt on that theory.
Want more iPhone 8 news? We've collated all the speculation for our rumours round-up.
According to KGI's Ming-Chi Kuo, the next iPhone will indeed feature a full-front OLED screen and will have a virtual home button on the screen.
However, the virtual button won't feature a built-in fingerprint sensor, he says.
Whether that means the fingerprint sensor will be moved to the back of the phone, as seen in the Samsung Galaxy S8, or dropped altogether, Kuo doesn't say.
Another theory is that Apple will build the sensor into the power button on the side of the phone.
Leaks show the button looking bigger than that on the iPhone 7, which suggests we could see some more tech packed into it.
Meanwhile, the TechSmarttt YouTube channel has posted a video of a leaked screen protector for the iPhone 8.
As you can see, extremely slim bezels are the order of the day (the bezels are the borders either side of the screen).
In keeping with previous rumours, the case also seems to suggest that the physical home button is for the chop.
The iPhone 8 should be announced in early September. Expect plenty more leaks before then.