In a new memo, Cowen and Company analyst Timothy Arcuri claims Apple’s fingerprint scanner for the iPhone 8 is “still being worked out,” Apple Insider reports. The company is still considering three options: Putting a pinhole in the glass to use an optical or ultrasonic sensor, using a capacitive or infrared “film” sensor embedded in the display, or simply thinning the display’s glass over a sensor area. However they decide to solve the problem, Arcuri sees a delay of at least one or two months in production, leaving the phone shipping in October at the earliest. Arcuri is also voicing doubts about whether the expected iPhone 7s and 7s Plus will even materialize, but still notes that the devices could still boost Apple’s sales in September by offering options like wireless charging.